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CVE-2025-20339

Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability

Published: Sep 24, 2025Updated: Sep 24, 2025 Sources: CVE List NVD BDUCWE-284
NVD MITRE
5.8CVSSMEDIUM
EPSS Score
0.3%
Top 79.2%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-284

Affected Products

SD-WAN vEdgeCisco Systems Inc.Networking Infrastructure
Cisco SD-WAN vEdge CloudCiscoNetworking Infrastructure
Cisco SD-WAN vEdge RouterCiscoNetworking Infrastructure
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-defaultacl-pSJk9nVF
sec.cloudapps.cisco.com

Timeline

Published
Sep 24, 2025
Last Updated
Sep 24, 2025

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