CVE-2026-20310: Improper Link Resolution Before File Access ('Link Following') in Cisco Cisco Catalyst SD-WAN Controller
CVE-2026-20310 is a critical vulnerability in Cisco Catalyst SD-WAN related to improper link resolution before file access, classified under CWE-59. It was discovered during an internal security review by Cisco's engineering team, leading to software hardening releases addressing multiple vulnerabilities. The vulnerability has a CVSS 3.1 score of 9.1, indicating high impact on confidentiality, integrity, and availability. No specific affected versions or patch links are provided in the available data. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-20310 involves improper link resolution before file access in Cisco Catalyst SD-WAN products, categorized under CWE-59. This vulnerability was identified through Cisco's internal security review process and resulted in software hardening releases to mitigate the issue. The CVSS 3.1 base score is 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H), indicating a critical severity with network attack vector, low attack complexity, high privileges required, no user interaction, and a scope change with high impact on confidentiality, integrity, and availability.
Potential Impact
The vulnerability allows an attacker with high privileges to exploit improper link resolution before file access, potentially leading to a complete compromise of confidentiality, integrity, and availability of the affected system. The critical CVSS score reflects the severity of the impact if exploited.
Mitigation Recommendations
Cisco has conducted an internal security review and released software hardening updates addressing this vulnerability. Although no explicit patch links are provided, the vendor advisory indicates that fixes are available. Users should apply the latest Cisco Catalyst SD-WAN software updates as provided by Cisco to remediate this issue. Monitor Cisco's official advisories for specific patch information and deployment instructions.
CVE-2026-20310: Improper Link Resolution Before File Access ('Link Following') in Cisco Cisco Catalyst SD-WAN Controller
Description
CVE-2026-20310 is a critical vulnerability in Cisco Catalyst SD-WAN related to improper link resolution before file access, classified under CWE-59. It was discovered during an internal security review by Cisco's engineering team, leading to software hardening releases addressing multiple vulnerabilities. The vulnerability has a CVSS 3.1 score of 9.1, indicating high impact on confidentiality, integrity, and availability. No specific affected versions or patch links are provided in the available data. There are no known exploits in the wild at this time.
CVSS v3.1
Score 9.1critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-20310 involves improper link resolution before file access in Cisco Catalyst SD-WAN products, categorized under CWE-59. This vulnerability was identified through Cisco's internal security review process and resulted in software hardening releases to mitigate the issue. The CVSS 3.1 base score is 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H), indicating a critical severity with network attack vector, low attack complexity, high privileges required, no user interaction, and a scope change with high impact on confidentiality, integrity, and availability.
Potential Impact
The vulnerability allows an attacker with high privileges to exploit improper link resolution before file access, potentially leading to a complete compromise of confidentiality, integrity, and availability of the affected system. The critical CVSS score reflects the severity of the impact if exploited.
Mitigation Recommendations
Cisco has conducted an internal security review and released software hardening updates addressing this vulnerability. Although no explicit patch links are provided, the vendor advisory indicates that fixes are available. Users should apply the latest Cisco Catalyst SD-WAN software updates as provided by Cisco to remediate this issue. Monitor Cisco's official advisories for specific patch information and deployment instructions.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fhhx-46fx-737r
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-20310"]
- Ecosystems
- []
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a808b8bbf8831d5395045a1
Added to database: 08/15/2026, 15:53:47 UTC
Last enriched: 08/15/2026, 17:15:25 UTC
Last updated: 08/15/2026, 17:15:25 UTC
Views: 5
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