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VAR-202509-4014

Vulnerability from variot - Updated: 2025-11-28 23:25

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. Cisco SD-WAN vEdge is a router manufactured by Cisco Systems, Inc

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CVE-2025-20339 (GCVE-0-2025-20339)

Vulnerability from cvelistv5 – Published: 2025-09-24 16:40 – Updated: 2025-09-24 17:04

Title

Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability

Summary

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.

Severity ?

5.8 (Medium)


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

CWE

CWE-284 - Improper Access Control

Assigner

cisco

References

URL

Tags

https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

Vendor

Product

Version

Cisco

Cisco SD-WAN vEdge Cloud

Affected: 20.9.1
Affected: 20.9.1.1
Affected: 20.9.2
Affected: 20.9.3
Affected: 20.9.3.1
Affected: 20.9.2.2
Affected: 20.9.2.3
Affected: 20.9.4
Affected: 20.9.5
Affected: 20.9.5.1
Affected: 20.9.6
Affected: 20.9.5.3

Cisco

Cisco SD-WAN vEdge Router

Affected: 20.3.1
Affected: 20.3.2
Affected: 20.4.1
Affected: 20.4.1.1
Affected: 20.3.3
Affected: 20.4.1.2
Affected: 20.4.2
Affected: 20.3.4
Affected: 20.3.5
Affected: 20.9.1
Affected: 20.3.6
Affected: 20.9.2
Affected: 20.3.7
Affected: 20.9.3
Affected: 20.3.3.2
Affected: 20.3.4.3
Affected: 20.9.3.1
Affected: 20.3.7.1
Affected: 20.3.5.1
Affected: 20.4.2.3
Affected: 20.9.2.2
Affected: 20.3.7.2
Affected: 20.9.2.3
Affected: 20.9.4
Affected: 20.12.1
Affected: 20.3.8
Affected: 20.9.4.1777
Affected: 20.9.5
Affected: 20.9.5.1
Affected: 20.12.3.1
Affected: 20.9.6
Affected: 20.9.5.3

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-20339",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-24T17:03:59.125030Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-09-24T17:04:25.755Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco SD-WAN vEdge Cloud",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "20.9.1"
            },
            {
              "status": "affected",
              "version": "20.9.1.1"
            },
            {
              "status": "affected",
              "version": "20.9.2"
            },
            {
              "status": "affected",
              "version": "20.9.3"
            },
            {
              "status": "affected",
              "version": "20.9.3.1"
            },
            {
              "status": "affected",
              "version": "20.9.2.2"
            },
            {
              "status": "affected",
              "version": "20.9.2.3"
            },
            {
              "status": "affected",
              "version": "20.9.4"
            },
            {
              "status": "affected",
              "version": "20.9.5"
            },
            {
              "status": "affected",
              "version": "20.9.5.1"
            },
            {
              "status": "affected",
              "version": "20.9.6"
            },
            {
              "status": "affected",
              "version": "20.9.5.3"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "Cisco SD-WAN vEdge Router",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "20.3.1"
            },
            {
              "status": "affected",
              "version": "20.3.2"
            },
            {
              "status": "affected",
              "version": "20.4.1"
            },
            {
              "status": "affected",
              "version": "20.4.1.1"
            },
            {
              "status": "affected",
              "version": "20.3.3"
            },
            {
              "status": "affected",
              "version": "20.4.1.2"
            },
            {
              "status": "affected",
              "version": "20.4.2"
            },
            {
              "status": "affected",
              "version": "20.3.4"
            },
            {
              "status": "affected",
              "version": "20.3.5"
            },
            {
              "status": "affected",
              "version": "20.9.1"
            },
            {
              "status": "affected",
              "version": "20.3.6"
            },
            {
              "status": "affected",
              "version": "20.9.2"
            },
            {
              "status": "affected",
              "version": "20.3.7"
            },
            {
              "status": "affected",
              "version": "20.9.3"
            },
            {
              "status": "affected",
              "version": "20.3.3.2"
            },
            {
              "status": "affected",
              "version": "20.3.4.3"
            },
            {
              "status": "affected",
              "version": "20.9.3.1"
            },
            {
              "status": "affected",
              "version": "20.3.7.1"
            },
            {
              "status": "affected",
              "version": "20.3.5.1"
            },
            {
              "status": "affected",
              "version": "20.4.2.3"
            },
            {
              "status": "affected",
              "version": "20.9.2.2"
            },
            {
              "status": "affected",
              "version": "20.3.7.2"
            },
            {
              "status": "affected",
              "version": "20.9.2.3"
            },
            {
              "status": "affected",
              "version": "20.9.4"
            },
            {
              "status": "affected",
              "version": "20.12.1"
            },
            {
              "status": "affected",
              "version": "20.3.8"
            },
            {
              "status": "affected",
              "version": "20.9.4.1777"
            },
            {
              "status": "affected",
              "version": "20.9.5"
            },
            {
              "status": "affected",
              "version": "20.9.5.1"
            },
            {
              "status": "affected",
              "version": "20.12.3.1"
            },
            {
              "status": "affected",
              "version": "20.9.6"
            },
            {
              "status": "affected",
              "version": "20.9.5.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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.\r\n\r\nThis 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."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "Improper Access Control",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-24T16:40:27.448Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-defaultacl-pSJk9nVF",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-defaultacl-pSJk9nVF"
        }
      ],
      "source": {
        "advisory": "cisco-sa-defaultacl-pSJk9nVF",
        "defects": [
          "CSCwo83136"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2025-20339",
    "datePublished": "2025-09-24T16:40:27.448Z",
    "dateReserved": "2024-10-10T19:15:13.255Z",
    "dateUpdated": "2025-09-24T17:04:25.755Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

VAR-202509-4014

CVE-2025-20339 (GCVE-0-2025-20339)

Tags

Sightings

Nomenclature