CVE-2026-20304: Improper Access Control in Cisco Cisco Catalyst SD-WAN Controller
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.
AI Analysis
Technical Summary
Cisco Catalyst SD-WAN Controller contains an improper access control vulnerability (CVE-2026-20304) identified through an internal security review. This vulnerability falls under CWE-284 and affects numerous specific versions of the product. The CVSS 3.1 base score is 9.9 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H), indicating that an attacker with low privileges and no user interaction can exploit this remotely to fully compromise confidentiality, integrity, and availability of the system. The vendor has not yet provided an official remediation or patch. The vulnerability was publicly disclosed on August 5, 2026.
Potential Impact
The vulnerability allows an attacker with low privileges to bypass access controls remotely without user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability of the Cisco Catalyst SD-WAN Controller. This could enable unauthorized access and control over the affected system components.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, organizations should monitor Cisco's advisories closely for updates. Until a patch is available, restrict access to the affected systems to trusted users and networks to reduce exposure.
CVE-2026-20304: Improper Access Control in Cisco Cisco Catalyst SD-WAN Controller
Description
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 v3.1
Score 9.9critical
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Cisco Catalyst SD-WAN Controller contains an improper access control vulnerability (CVE-2026-20304) identified through an internal security review. This vulnerability falls under CWE-284 and affects numerous specific versions of the product. The CVSS 3.1 base score is 9.9 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H), indicating that an attacker with low privileges and no user interaction can exploit this remotely to fully compromise confidentiality, integrity, and availability of the system. The vendor has not yet provided an official remediation or patch. The vulnerability was publicly disclosed on August 5, 2026.
Potential Impact
The vulnerability allows an attacker with low privileges to bypass access controls remotely without user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability of the Cisco Catalyst SD-WAN Controller. This could enable unauthorized access and control over the affected system components.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, organizations should monitor Cisco's advisories closely for updates. Until a patch is available, restrict access to the affected systems to trusted users and networks to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.408Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a736b62bf8831d5392da515
Added to database: 08/05/2026, 16:57:06 UTC
Last enriched: 08/05/2026, 17:14:23 UTC
Last updated: 08/05/2026, 17:57:23 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.