CVE-2025-20339

mediumPriorität · verfolgen · 0EPSS 0.003 · 24. PerzentilDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.32% (24th) EPSS
CVSS 5.8 · medium
Is it mine?
49 products
Prüfe deine Angriffsfläche
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · bewertet 2026-10-27

A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.

01

Behebungen

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

Ein Hersteller-Fix ist verfügbar.

  • BehobenCisco SD-WAN vEdge Cloudcisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • BehobenCisco SD-WAN vEdge Routercisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • WorkaroundCisco SD-WAN vEdge Cloudcisco_csaf

    There is a workaround that addresses this vulnerability. Administrators should determine which ACL best suits their needs and then configure that single ACL type on the interface. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.

  • WorkaroundCisco SD-WAN vEdge Routercisco_csaf

    There is a workaround that addresses this vulnerability. Administrators should determine which ACL best suits their needs and then configure that single ACL type on the interface. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.

02

cvss

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

5.8
010

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

v3.15.8mediumAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · ENISA EU
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · psirt@cisco.com USAusnutzbarkeit 3.9 · Auswirkung 1.4
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · Cisco PSIRT US
03

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-284USCWE-284US
05

betroffene Produkte (49)

Betroffene Produkte und Versionsbereiche.

20 von 49 angezeigt
06

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

  • WID-SEC-W-2025-2120Cisco SD-WAN: Schwachstelle ermöglicht Umgehung von SicherheitsmaßnahmenDeutsch2025-09-24csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco SD-WAN ausnutzen, um Sicherheitsmaßnahmen zu umgehen.

  • cisco-sa-defaultacl-pSJk9nVFCisco SD-WAN vEdge Software Access Control List Bypass Vulnerability2025-09-24csaf · cisco_csafUS

    A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.

07

auch bekannt als (5)

Weitere Namen und Kennungen dieser Entität.

08

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdfstec_bducert_bundcisco_csafNVDCVE.orgMITRE
veröffentlicht 2025-09-24geändert 2026-06-17
09

Referenzen (4)

Externe Belege — Patches, Meldungen, Analysen.

scry

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