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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0003.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Cisco
  • Sd-wan Vedge Cloud
  • Sd-wan Vedge Router

No data.

No data.

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Vendors Products
Cisco
  • Sd-wan Vedge Cloud
  • Sd-wan Vedge Router
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-defaultacl-pSJk9nVF cve-icon cve-icon
History

Thu, 25 Sep 2025 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco sd-wan Vedge Cloud
Cisco sd-wan Vedge Router
Vendors & Products Cisco
Cisco sd-wan Vedge Cloud
Cisco sd-wan Vedge Router

Wed, 24 Sep 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 24 Sep 2025 17:00:00 +0000

Type Values Removed Values Added
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.
Title Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2025-09-24T17:04:25.755Z

Reserved: 2024-10-10T19:15:13.255Z

Link: CVE-2025-20339

cve-icon Vulnrichment

Updated: 2025-09-24T17:04:18.177Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-24T17:15:40.523

Modified: 2025-09-24T18:11:24.520

Link: CVE-2025-20339

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-25T08:21:06Z