What is CVE-2025-20339?

CVE-2025-20339 is a medium-severity vulnerability in Cisco Sd-wan Vedge Cloud, classified under Improper Access Control. CVSS score: 5.8/10. Published 2025-09-24.

How severe is CVE-2025-20339?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Cisco Sd-wan Vedge Cloud

CVE-2025-20339

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…

EPSS: 0.000 (10.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Cisco Sd-wan Vedge Cloud — versions 20.9.1, 20.9.1.1, 20.9.2
Cisco Sd-wan Vedge Router — versions 20.3.1, 20.3.2, 20.4.1

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

cisco-sa-defaultacl-pSJk9nVF

Frequently asked questions

What is CVE-2025-20339?: CVE-2025-20339 is a medium-severity vulnerability in Cisco Sd-wan Vedge Cloud, classified under Improper Access Control. CVSS score: 5.8/10. Published 2025-09-24.
How severe is CVE-2025-20339?: Medium severity. CVSS v3 base score is 5.8 out of 10.