SB2025092468 - ACL bypass in Cisco SD-WAN vEdge
Published: September 24, 2025
Security Bulletin ID
SB2025092468
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2025-20339)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 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
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 update from vendor's website.