CVE-2026-20304

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20304 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-284.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-sdwan-faLcR3K
https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-05 17:16

Updated : 2026-08-14 21:17

NVD link : CVE-2026-20304

Mitre link : CVE-2026-20304

CVE.ORG link : CVE-2026-20304

JSON object : View

Products Affected

No product.

CWE

CWE-284

Improper Access Control

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"version": "20.15.5.2"}, {"status": "affected", "version": "20.15.5.2_LI_Images"}, {"status": "affected", "version": "26.1.1.1_LI_Images"}, {"status": "affected", "version": "20.15.4.4"}, {"status": "affected", "version": "20.15.4.4_LI_Images"}, {"status": "affected", "version": "26.1.1.1"}, {"status": "affected", "version": "20.9.9.1_LI_Images"}, {"status": "affected", "version": "20.9.9.1"}, {"status": "affected", "version": "20.18.3.1_LI_Images"}, {"status": "affected", "version": "20.18.3.1"}, {"status": "affected", "version": "26.1.1.2"}, {"status": "affected", "version": "26.1.1.2_LI_Images"}, {"status": "affected", "version": "20.15.4.5"}, {"status": "affected", "version": "20.15.4.5_LI_Images"}, {"status": "affected", "version": "20.15.5.3"}, {"status": "affected", "version": "20.15.5.3_LI_Images"}, {"status": "affected", "version": "20.12.7.2_LI_Images"}, {"status": "affected", "version": "20.12.7.2"}, {"status": "affected", "version": "20.9.9.2"}, {"status": "affected", "version": "20.9.9.2_LI_Images"}, {"status": "affected", "version": "20.15.6"}, {"status": "affected", "version": "20.15.6_LI_Images"}, {"status": "affected", "version": "20.18.4"}, {"status": "affected", "version": "20.12.8"}, {"status": "affected", "version": "20.12.8_LI_Images"}], "defaultStatus": "unknown"}]}], "published": "2026-08-05T17:16:50.890", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-sdwan-faLcR3K", "source": "psirt@cisco.com"}, {"url": "https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-284"}]}], "descriptions": [{"lang": "en", "value": "As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that address multiple internally discovered vulnerabilities.\r\n\r\nThe vulnerabilities tracked by CVE-2026-20304 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-284."}], "lastModified": "2026-08-14T21:17:16.183", "sourceIdentifier": "psirt@cisco.com"}