CVE-2026-20338: Double Free in Cisco Cisco Secure Endpoint
A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper memory handling when processing content in zip files during scanning. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate as a result of a memory double-free, resulting in a DoS condition on the affected software.
AI Analysis
Technical Summary
This vulnerability exists due to improper memory handling in the zip archive parser component of ClamAV integrated within Cisco Secure Endpoint. When processing crafted zip files, a double-free error can occur, causing the scanning process to crash. An attacker can exploit this remotely without authentication by submitting malicious zip files for scanning, leading to a denial-of-service condition on the affected device.
Potential Impact
Successful exploitation causes the ClamAV scanning process within Cisco Secure Endpoint to terminate unexpectedly, resulting in a denial-of-service (DoS) condition. There is no impact on confidentiality or integrity reported. The vulnerability affects the availability of the endpoint protection service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor Cisco advisories for updates and apply patches once available.
CVE-2026-20338: Double Free in Cisco Cisco Secure Endpoint
Description
A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper memory handling when processing content in zip files during scanning. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate as a result of a memory double-free, resulting in a DoS condition on the affected software.
CVSS v3.1
Score 7.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists due to improper memory handling in the zip archive parser component of ClamAV integrated within Cisco Secure Endpoint. When processing crafted zip files, a double-free error can occur, causing the scanning process to crash. An attacker can exploit this remotely without authentication by submitting malicious zip files for scanning, leading to a denial-of-service condition on the affected device.
Potential Impact
Successful exploitation causes the ClamAV scanning process within Cisco Secure Endpoint to terminate unexpectedly, resulting in a denial-of-service (DoS) condition. There is no impact on confidentiality or integrity reported. The vulnerability affects the availability of the endpoint protection service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor Cisco advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.413Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a760e52bf8831d539a765d9
Added to database: 08/07/2026, 16:56:50 UTC
Last enriched: 08/07/2026, 17:14:01 UTC
Last updated: 08/07/2026, 20:51:15 UTC
Views: 6
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