PT-2025-39290 · Cisco · Cisco Sd-Wan Vedge

Published 2025-09-24 · Updated 2025-09-24 · CVE-2025-20339

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco SD-WAN vEdge Software (affected versions not specified)

Description A flaw exists in how IPv4 packet access control lists (ACLs) are handled, potentially allowing a remote, unauthenticated attacker to circumvent configured ACLs. This is caused by the improper enforcement of an implicit deny all rule at the end of a configured ACL. An attacker could exploit this by sending unauthorized traffic to an interface on a vulnerable device, bypassing the intended security measures.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

BDU:2025-11732

CVE-2025-20339

Affected Products

Cisco Sd-Wan Vedge

References · 5

• https://bdu.fstec.ru/vul/2025-11732 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-20339 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-defaultacl-pSJk9nVF · Vendor Advisory
• https://twitter.com/0dayPublishing/status/1970903568409309446 · Twitter Post
• https://twitter.com/CVEnew/status/1970895336768991648 · Twitter Post