Cisco SD-WAN vEdge ACL Bypass Vulnerability (CVE-2025-20339)
CVE-2025-20339 Published on September 24, 2025
Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
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.
Vulnerability Analysis
CVE-2025-20339 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2025-20339 has been classified to as an Authorization vulnerability or weakness.
Products Associated with CVE-2025-20339
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Affected Versions
Cisco SD-WAN vEdge Cloud:- Version 20.9.1 is affected.
- Version 20.9.1.1 is affected.
- Version 20.9.2 is affected.
- Version 20.9.3 is affected.
- Version 20.9.3.1 is affected.
- Version 20.9.2.2 is affected.
- Version 20.9.2.3 is affected.
- Version 20.9.4 is affected.
- Version 20.9.5 is affected.
- Version 20.9.5.1 is affected.
- Version 20.9.6 is affected.
- Version 20.9.5.3 is affected.
- Version 20.3.1 is affected.
- Version 20.3.2 is affected.
- Version 20.4.1 is affected.
- Version 20.4.1.1 is affected.
- Version 20.3.3 is affected.
- Version 20.4.1.2 is affected.
- Version 20.4.2 is affected.
- Version 20.3.4 is affected.
- Version 20.3.5 is affected.
- Version 20.9.1 is affected.
- Version 20.3.6 is affected.
- Version 20.9.2 is affected.
- Version 20.3.7 is affected.
- Version 20.9.3 is affected.
- Version 20.3.3.2 is affected.
- Version 20.3.4.3 is affected.
- Version 20.9.3.1 is affected.
- Version 20.3.7.1 is affected.
- Version 20.3.5.1 is affected.
- Version 20.4.2.3 is affected.
- Version 20.9.2.2 is affected.
- Version 20.3.7.2 is affected.
- Version 20.9.2.3 is affected.
- Version 20.9.4 is affected.
- Version 20.12.1 is affected.
- Version 20.3.8 is affected.
- Version 20.9.4.1777 is affected.
- Version 20.9.5 is affected.
- Version 20.9.5.1 is affected.
- Version 20.12.3.1 is affected.
- Version 20.9.6 is affected.
- Version 20.9.5.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.