CVE-2026-20215: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in Cisco Cisco Secure Endpoint
CVE-2026-20215 is a high-severity vulnerability in Cisco Secure Endpoint involving a buffer overflow in the 7z file format parser of ClamAV. An unauthenticated remote attacker can exploit this by submitting a crafted 7z file to cause a denial-of-service (DoS) condition due to memory corruption during scanning. The vulnerability arises from improper boundary checks leading to out-of-bounds buffer writes. No official patch or remediation guidance is currently confirmed.
AI Analysis
Technical Summary
This vulnerability affects the 7z file format parser component of ClamAV integrated into Cisco Secure Endpoint. It is caused by improper boundary checks on 7z file content during scanning, which can result in an out-of-bounds buffer write. An attacker can exploit this by submitting a maliciously crafted 7z file to the scanning process, causing memory corruption and termination of the scanning process, leading to a denial-of-service condition. The vulnerability does not require authentication and can be triggered remotely. There is no explicit vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation results in denial-of-service by terminating the ClamAV scanning process on affected Cisco Secure Endpoint devices. There is no confirmed impact on confidentiality or integrity. The vulnerability does not require user interaction or privileges, increasing its risk for disruption of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid scanning untrusted 7z files or implement compensating controls as recommended by Cisco once advisories are published.
CVE-2026-20215: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in Cisco Cisco Secure Endpoint
Description
CVE-2026-20215 is a high-severity vulnerability in Cisco Secure Endpoint involving a buffer overflow in the 7z file format parser of ClamAV. An unauthenticated remote attacker can exploit this by submitting a crafted 7z file to cause a denial-of-service (DoS) condition due to memory corruption during scanning. The vulnerability arises from improper boundary checks leading to out-of-bounds buffer writes. No official patch or remediation guidance is currently confirmed.
CVSS v3.1
Score 7.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the 7z file format parser component of ClamAV integrated into Cisco Secure Endpoint. It is caused by improper boundary checks on 7z file content during scanning, which can result in an out-of-bounds buffer write. An attacker can exploit this by submitting a maliciously crafted 7z file to the scanning process, causing memory corruption and termination of the scanning process, leading to a denial-of-service condition. The vulnerability does not require authentication and can be triggered remotely. There is no explicit vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation results in denial-of-service by terminating the ClamAV scanning process on affected Cisco Secure Endpoint devices. There is no confirmed impact on confidentiality or integrity. The vulnerability does not require user interaction or privileges, increasing its risk for disruption of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid scanning untrusted 7z files or implement compensating controls as recommended by Cisco once advisories are published.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.398Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a45492827e9c79719d62048
Added to database: 07/01/2026, 17:06:48 UTC
Last enriched: 08/13/2026, 20:46:22 UTC
Last updated: 08/15/2026, 18:26:26 UTC
Views: 49
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