CVE-2025-20271

highPriorität · verfolgen · 0EPSS 0.005 · 45. PerzentilDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.54% (45th) EPSS

CVSS 8.6 · high

Is it mine?

16 products

Prüfe deine Angriffsfläche

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · bewertet 2026-10-27

A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition in the Cisco AnyConnect service on an affected device. This vulnerability is due to variable initialization errors when an SSL VPN session is established. An attacker could exploit this vulnerability by sending a sequence of crafted HTTPS requests to an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to restart, resulting in the failure of all established SSL VPN sessions and forcing remote users to initiate a new VPN connection and re-authenticate. A sustained attack could prevent new SSL VPN connections from being established, effectively making the Cisco AnyConnect VPN service unavailable for all legitimate users.

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

BehobenCisco Meraki MX Firmwarecisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

8.6

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USAusnutzbarkeit 3.9 · Auswirkung 4

v3.17.9highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · NCSC-NL NL

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-457USCWE-457USCWE-457US

betroffene Produkte (16)

Betroffene Produkte und Versionsbereiche.

Cisco Meraki MX <18.107.13alle Versionencert_bundDE
Cisco Meraki MX <18.211.6alle Versionencert_bundDE
Cisco Meraki MX <19.1.8alle Versionencert_bundDE
Cisco Meraki MX< 18.107.13cert_bundDE
Cisco Meraki MX< 18.211.6cert_bundDE
Cisco Meraki MX< 19.1.8cert_bundDE
Cisco Cisco Meraki MX Firmwarealle Versionencisco_csafUS
Cisco Cisco Meraki MX Firmware≤ N/Aenisa_euvdEU
Cisco Systems Inc. Cisco Meraki MX≤ 17fstec_bduRU
Cisco Systems Inc. Cisco Meraki MX≤ 16.2fstec_bduRU
Cisco Systems Inc. Cisco Meraki MX≤ 19.1.8fstec_bduRU
Cisco Systems Inc. Cisco Meraki MX≤ 18.211.6fstec_bduRU
Cisco Systems Inc. Cisco Meraki MX≤ 18.107.13fstec_bduRU
Meraki MX≤ vers:unknown/unknownncsc_nlNLcpe:2.3:h:cisco:meraki_mx:-:*:*:*:*:*:*:*
Cisco Cisco Meraki MX Firmware≤ vers:unknown/n/ancsc_nlNL
Cisco Meraki Z1≤ vers:unknown/unknownncsc_nlNL

Advisories (3)

Hersteller- und Ökosystem-Meldungen dazu.

NCSC-2025-0199Kwetsbaarheid verholpen in Cisco AnyConnect VPN voor Meraki MX en ZNL2025-06-19csaf · ncsc_nlNL
Cisco heeft een kwetsbaarheid verholpen in de Cisco AnyConnect VPN server op Cisco Meraki MX en Z Series apparaten.
WID-SEC-W-2025-1361Cisco Meraki MX: Schwachstelle ermöglicht Denial of ServiceDeutsch2025-06-19csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco Meraki MX ausnutzen, um einen Denial of Service Angriff durchzuführen.
cisco-sa-meraki-mx-vpn-dos-sM5GCfm7Cisco Meraki MX and Z Series AnyConnect VPN with Client Certificate Authentication Denial of Service Vulnerability2025-06-18csaf · cisco_csafUS
A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition in the Cisco AnyConnect service on an affected device. This vulnerability is due to variable initialization errors when an SSL VPN session is established. An attacker could exploit this vulnerability by sending a sequence of crafted HTTPS requests to an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to restart, resulting in the failure of all established SSL VPN sessions and forcing remote users to initiate a new VPN connection and re-authenticate. A sustained attack could prevent new SSL VPN connections from being established, effectively making the Cisco AnyConnect VPN service unavailable for all legitimate users. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu cert_bund cisco_csaf ncsc_nl NVD CVE.org MITRE

veröffentlicht 2025-06-18geändert 2026-06-17

Referenzen (4)

Externe Belege — Patches, Meldungen, Analysen.

scry

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