CVE-2025-20339

MEDIUM EPSS 21.1%

Published Sep 24, 20259mo ago · Modified Jun 17, 20262w ago

5.8 CVSS 3.1

Medium

Published Sep 24, 2025 9mo ago

Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score

5.8

Exploitability

3.9

Impact

1.4

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Changed

Confidentiality None

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

21.1% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-284

References 1

sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-defaultacl-pSJk9nVF

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.