ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerability
Priority MEDIUM 40CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
A vulnerability in the FSG file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in FSG files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains portable executable content compressed with FSG to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00573 47th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco Secure Endpoint | 7.0.5; 6.2.19; 7.3.3; 7.2.13; 6.1.5; 6.3.1; 6.2.5; 7.3.5; 6.2.1; 7.2.7; 7.1.1; 6.3.5; 6.2.9; 7.3.1; 6.1.7; 7.2.11; 7.2.3; 7.1.5; 6.3.3; 7.3.9; 6.2.3; 6.1.9; 6.0.9; 7.2.5; 6.0.7; 6.3.7; 1.12.3; 1.8.0; 1.11.1; 1.12.4; 1.10.0; 1.12.0; 1.8.1; 1.10.1; 1.12.1; 1.12.6; 1.14.0; 1.10.2; 1.12.7; 1.12.2; 1.6.0; 1.9.0; 1.11.0; 1.7.0; 1.13.0; 1.8.4; 1.13.1; 1.9.1; 1.12.5; 1.13.2; 8.1.7.21512; 8.1.7; 8.1.5; 8.1.3.21242; 8.1.3; 8.1.5.21322; 8.1.7.21417; 1.14.1; 1.15.1; 1.15.2; 1.15.3; 1.15.4; 1.15.5; 1.15.6; 1.16.0; 1.16.1; 1.16.2; 1.16.3; 1.18.0; 1.18.1; 1.20.0; 1.21.0; 1.21.1; 1.21.2; 1.21.3; 1.22.0; 1.22.1; 1.22.2; 1.22.3; 1.22.4; 1.24.0; 1.24.1; 1.24.2; 1.24.3; 1.24.4; 1.26.0; 1.24.5; 1.26.1; 1.27.0; 1.15.0; 1.17.0; 1.17.1; 1.17.2; 1.19.0; 1.20.1; 1.20.2; 1.20.3; 1.20.4; 1.20.5; 1.20.6; 1.23.0; 1.23.1; 1.20.7; 1.20.8; 1.25.0; 1.25.1; 1.25.2; 1.27.1; 1.27.2; 7.3.13; 7.3.15; 7.4.1; 7.4.1.20425; 7.4.1.20439; 7.4.3; 7.4.3.20679; 7.4.5; 7.5.1.20813; 7.5.1.20833; 7.5.3; 7.5.5; 8.0.1.21160; 8.0.1.21164; 7.5.7; 7.5.9; 7.5.11; 8.1.7.21585; 7.5.13.21586; 7.5.13.21598; 8.2.1.21612; 8.2.1.21650; 7.5.15.21611; 7.5.17.21680; 8.2.3.30119; 8.2.4.30130; 8.4.0; 7.5.19; 8.4.1.30298; 8.4.2.30317; 8.4.1.30307; 7.5.20; 8.4.3; 8.4.4.30419; 8.4.4.30467; 7.5.21.21732; 8.4.5.30483 | — | No fix listed | CNA |
- Cisco Secure Endpoint VendorCisco Affected 7.0.5; 6.2.19; 7.3.3; 7.2.13; 6.1.5; 6.3.1; 6.2.5; 7.3.5; 6.2.1; 7.2.7; 7.1.1; 6.3.5; 6.2.9; 7.3.1; 6.1.7; 7.2.11; 7.2.3; 7.1.5; 6.3.3; 7.3.9; 6.2.3; 6.1.9; 6.0.9; 7.2.5; 6.0.7; 6.3.7; 1.12.3; 1.8.0; 1.11.1; 1.12.4; 1.10.0; 1.12.0; 1.8.1; 1.10.1; 1.12.1; 1.12.6; 1.14.0; 1.10.2; 1.12.7; 1.12.2; 1.6.0; 1.9.0; 1.11.0; 1.7.0; 1.13.0; 1.8.4; 1.13.1; 1.9.1; 1.12.5; 1.13.2; 8.1.7.21512; 8.1.7; 8.1.5; 8.1.3.21242; 8.1.3; 8.1.5.21322; 8.1.7.21417; 1.14.1; 1.15.1; 1.15.2; 1.15.3; 1.15.4; 1.15.5; 1.15.6; 1.16.0; 1.16.1; 1.16.2; 1.16.3; 1.18.0; 1.18.1; 1.20.0; 1.21.0; 1.21.1; 1.21.2; 1.21.3; 1.22.0; 1.22.1; 1.22.2; 1.22.3; 1.22.4; 1.24.0; 1.24.1; 1.24.2; 1.24.3; 1.24.4; 1.26.0; 1.24.5; 1.26.1; 1.27.0; 1.15.0; 1.17.0; 1.17.1; 1.17.2; 1.19.0; 1.20.1; 1.20.2; 1.20.3; 1.20.4; 1.20.5; 1.20.6; 1.23.0; 1.23.1; 1.20.7; 1.20.8; 1.25.0; 1.25.1; 1.25.2; 1.27.1; 1.27.2; 7.3.13; 7.3.15; 7.4.1; 7.4.1.20425; 7.4.1.20439; 7.4.3; 7.4.3.20679; 7.4.5; 7.5.1.20813; 7.5.1.20833; 7.5.3; 7.5.5; 8.0.1.21160; 8.0.1.21164; 7.5.7; 7.5.9; 7.5.11; 8.1.7.21585; 7.5.13.21586; 7.5.13.21598; 8.2.1.21612; 8.2.1.21650; 7.5.15.21611; 7.5.17.21680; 8.2.3.30119; 8.2.4.30130; 8.4.0; 7.5.19; 8.4.1.30298; 8.4.2.30317; 8.4.1.30307; 7.5.20; 8.4.3; 8.4.4.30419; 8.4.4.30467; 7.5.21.21732; 8.4.5.30483 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:* | before 1.27.2 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:* | before 1.29.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:* | before 8.6.2 | Vulnerable | Cisco |
| cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* | before 1.4.5; 1.5.0 to before 1.5.3 | Vulnerable | ClamAV |
- cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:* Versions before 1.27.2 Vulnerable ·Cisco
- cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:* Versions before 1.29.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:* Versions before 8.6.2 Vulnerable ·Cisco
- cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* Versions before 1.4.5; 1.5.0 to before 1.5.3 Vulnerable ·ClamAV
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-20214
- 2026-10-03 Alias added: GHSA-86w7-h9x4-hpxv
References
Advisory 1
More Cisco Secure Endpoint vulnerabilities
- TI-2023-06741 Buffer overflow in Cisco Secure Web Appliance CVSS 3.1CRITICAL 9.8
- TI-2024-13224 Out-of-bounds read in Cisco Secure Endpoint CVSS 3.1HIGH 7.5
- TI-2022-05329 ClamAV CHM File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022 CVSS 3.1HIGH 8.6
- TI-2022-05344 ClamAV HTML Scanning Memory Leak Vulnerability Affecting Cisco Products: April 2022 CVSS 3.1HIGH 7.5
- TI-2022-05330 ClamAV TIFF File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022 CVSS 3.1HIGH 7.5
- TI-2026-16532 ClamAV XAR File Format Processing Memory Corruption Vulnerability CVSS 3.1HIGH 7.5
Sources
- CVE-2026-20214 · CVE Program
- CVE-2026-20214 · NVD
- FIRST EPSS
- GHSA-86w7-h9x4-hpxv · GitHub Advisory Database · CC BY 4.0
- CVE-2026-20214 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences