Scanning-process crash via GPT endian conversion
Published Aug 7, 2026 · Updated Aug 7, 2026
Stack-based buffer overflow in the ClamAV GPT parser in Cisco Secure Endpoint allows remote attackers to crash the scanning process. The parser mishandles an endian conversion while scanning a crafted GPT file and performs an out-of-bounds buffer write. No authentication or user interaction is required; the file must reach ClamAV scanning, and exploitation terminates that process.
Summary
What happened
Stack-based buffer overflow in the ClamAV GPT parser in Cisco Secure Endpoint allows remote attackers to crash the scanning process. The parser mishandles an endian conversion while scanning a crafted GPT file and performs an out-of-bounds buffer write. No authentication or user interaction is required; the file must reach ClamAV scanning, and exploitation terminates that process.
The record
- CVE
- CVE-2026-20345
- Published
- Aug 7, 2026
- Updated
- Aug 7, 2026
- Vendor
- ClamAV
- Product
- Cisco Secure Endpoint
- Classifications
- CWE-121, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 7, 2026CVE publishedPublication date reported by the CVE source.
- Aug 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1.0
- Affected versionversion=1.10.0
- Affected versionversion=1.10.1
- Affected versionversion=1.10.2
- Affected versionversion=1.11.0
- Affected versionversion=1.11.1
- Affected versionversion=1.12.0
- Affected versionversion=1.12.1
- Affected versionversion=1.12.2
- Affected versionversion=1.12.3
- Affected versionversion=1.12.4
- Affected versionversion=1.12.5
- Affected versionversion=1.12.6
- Affected versionversion=1.14.0
- Affected versionversion=1.15.2
- Affected versionversion=1.16.0
- Affected versionversion=1.19.0
- Affected versionversion=1.21.0
- Affected versionversion=1.22.2
- Affected versionversion=1.24.5
- Affected versionversion=1.6.0
- Affected versionversion=1.7.0
- Affected versionversion=1.8.0
- Affected versionversion=1.8.1
- Affected versionversion=1.8.4
- Affected versionversion=1.9.0
- Affected versionversion=1.9.1
- Affected versionversion=2.0.2
- Affected versionversion=2.4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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