CVE-2026-20345: Stack-based Buffer Overflow in Cisco Cisco Secure Endpoint
A vulnerability in the GPT file format parser of ClamAV allows an unauthenticated remote attacker to cause a denial-of-service (DoS) condition due to improper handling of endian conversion leading to an out-of-bounds buffer write. Exploitation involves submitting a crafted GPT file to ClamAV for scanning, which may cause the scanning process to terminate unexpectedly.
AI Analysis
Technical Summary
CVE-2026-20345 is a high-severity vulnerability in ClamAV's GPT file format parser caused by improper handling of an endian conversion operation. This flaw can lead to an out-of-bounds buffer write, resulting in memory corruption. An unauthenticated remote attacker can exploit this by submitting a specially crafted GPT file to be scanned, causing the ClamAV scanning process to crash and produce a denial-of-service condition. There is no indication of confidentiality or integrity impact, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation results in a denial-of-service condition by terminating the ClamAV scanning process. There is no confirmed impact on confidentiality or integrity. The vulnerability arises from memory corruption due to an out-of-bounds buffer write.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting access to ClamAV scanning services or scanning untrusted GPT files in isolated environments to minimize potential impact.
CVE-2026-20345: Stack-based Buffer Overflow in Cisco Cisco Secure Endpoint
Description
A vulnerability in the GPT file format parser of ClamAV allows an unauthenticated remote attacker to cause a denial-of-service (DoS) condition due to improper handling of endian conversion leading to an out-of-bounds buffer write. Exploitation involves submitting a crafted GPT file to ClamAV for scanning, which may cause the scanning process to terminate unexpectedly.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-20345 is a high-severity vulnerability in ClamAV's GPT file format parser caused by improper handling of an endian conversion operation. This flaw can lead to an out-of-bounds buffer write, resulting in memory corruption. An unauthenticated remote attacker can exploit this by submitting a specially crafted GPT file to be scanned, causing the ClamAV scanning process to crash and produce a denial-of-service condition. There is no indication of confidentiality or integrity impact, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation results in a denial-of-service condition by terminating the ClamAV scanning process. There is no confirmed impact on confidentiality or integrity. The vulnerability arises from memory corruption due to an out-of-bounds buffer write.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting access to ClamAV scanning services or scanning untrusted GPT files in isolated environments to minimize potential impact.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-775x-c574-8mff
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-20345"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a7742a1bf8831d539b08662
Added to database: 08/08/2026, 14:52:17 UTC
Last enriched: 08/08/2026, 15:16:59 UTC
Last updated: 08/09/2026, 03:40:59 UTC
Views: 2
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