CVE-2025-20339 MEDIUM

CVE-2025-20339: Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability

Vendor Cisco
Product Cisco SD-WAN vEdge Cloud
Weakness CWE-284
Published September 24, 2025
Last update September 24, 2025
View on NVD All CVEs

CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 24, 2025 CVE published
September 24, 2025 Record updated