#VU116085 Improper access control in Cisco SD-WAN vEdge Routers - CVE-2025-20339

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Main Vulnerability Database Vulnerabilities #VU116085

#VU116085 Improper access control in Cisco SD-WAN vEdge Routers - CVE-2025-20339

Published: September 24, 2025


Vulnerability identifier: #VU116085
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2025-20339
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco SD-WAN vEdge Routers
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper enforcement of the "implicit deny all" at the end of a configured ACL when processing IPv4 packets. A remote attacker can bypass implemented security restrictions and send unauthorized traffic to a device interface. 


Remediation

Install updates from vendor's website.

External links