CVE-2025-20311
highPriorität · verfolgen · 0EPSS 0.002 · 10. PerzentilDEEUNLRUUSEPSS · bewertet 2026-10-27
A vulnerability in the handling of certain Ethernet frames in Cisco IOS XE Software for Catalyst 9000 Series Switches could allow an unauthenticated, adjacent attacker to cause an egress port to become blocked and drop all outbound traffic. This vulnerability is due to improper handling of crafted Ethernet frames. An attacker could exploit this vulnerability by sending crafted Ethernet frames through an affected switch. A successful exploit could allow the attacker to cause the egress port to which the crafted frame is forwarded to start dropping all frames, resulting in a denial of service (DoS) condition.
Behebungen
Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.
Ein Hersteller-Fix ist verfügbar.
- Behoben16.10.1cisco_csaf
Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Behoben17.10.1bcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Behoben17.11.1cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Behoben17.11.1acisco_csaf
Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Behoben17.12.3acisco_csaf
Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Behoben17.14.1acisco_csaf
Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Behoben17.8.1acisco_csaf
Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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cvss
Technischer Schweregrad, 0–10. Eine Zeile je Quelle.
Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 6.8–7.4
SSVC
Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.
schwächen
Die CWE-Schwächeklassen, zu denen dies gehört.
betroffene Produkte (363)
Betroffene Produkte und Versionsbereiche.
- Cisco IOS XE Catalyst 9000 Switchesalle Versionencert_bundDEcpe:/o:cisco:ios_xe:catalyst_9000_switches
Advisories (3)
Hersteller- und Ökosystem-Meldungen dazu.
- NCSC-2025-0297Kwetsbaarheden verholpen in Cisco IOS en Cisco IOS XE SoftwareNL2025-09-25csaf · ncsc_nlNL
Cisco heeft kwetsbaarheden verholpen in Cisco IOS en Cisco IOS XE Software.
- WID-SEC-W-2025-2128Cisco IOS XE: Mehrere SchwachstellenDeutsch2025-09-24csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Cisco IOS XE ausnutzen, um Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen und Sicherheitsmaßnahmen zu umgehen.
- cisco-sa-cat9k-PtmD7bgyCisco IOS XE Software for Catalyst 9000 Series Switches Denial of Service Vulnerability2025-09-24csaf · cisco_csafUS
A vulnerability in the handling of certain Ethernet frames in Cisco IOS XE Software for Catalyst 9000 Series Switches could allow an unauthenticated, adjacent attacker to cause an egress port to become blocked and drop all outbound traffic. This vulnerability is due to improper handling of crafted Ethernet frames. An attacker could exploit this vulnerability by sending crafted Ethernet frames through an affected switch. A successful exploit could allow the attacker to cause the egress port to which the crafted frame is forwarded to start dropping all frames, resulting in a denial of service (DoS) condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is part of the September 2025 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2025 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75296"].
auch bekannt als (5)
Weitere Namen und Kennungen dieser Entität.
quellen
Welche Quellen diesen Datensatz belegen und wann.
Referenzen (4)
Externe Belege — Patches, Meldungen, Analysen.
- https://access.redhat.com/security/cve/cve-2025-20311cnnvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-PtmD7bgycnnvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-PtmD7bgyenisa_euvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-PtmD7bgynvd
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