CVE-2025-20339CWE-284broken-access-control

CVE-2025-20339

Medium · published September 24, 2025

CVSS v3.1
5.8
EPSS
0%
Percentile
23.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00315 · 23.2th percentile
Weakness
CWE-284 · Improper Access Control
Published
2025-09-24T21:15Z
References (1)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-defaultacl-pSJk9nVF · [email protected]
EPSS history
Timeline
  • 24 SEP 16:40Z
    Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
    cvelistv5