CVE-2026-20345 (GCVE-0-2026-20345)

Vulnerability from cvelistv5 – Published: 2026-08-07 16:42 – Updated: 2026-08-07 21:02
VLAI
Title
ClamAV GPT File Format Processing Memory Corruption Vulnerability
Summary
A vulnerability in the GPT file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper handling of an endian conversion operation, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted GPT file 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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 20:59 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version CPE status
Cisco Cisco Secure Endpoint Affected: 1.12.3
Affected: 1.8.0
Affected: 1.11.1
Affected: 1.12.4
Affected: 1.10.0
Affected: 1.12.0
Affected: 1.8.1
Affected: 1.10.1
Affected: 1.10.2
Affected: 1.12.2
Affected: 1.6.0
Affected: 1.9.0
Affected: 1.7.0
Affected: 1.12.1
Affected: 1.12.6
Affected: 1.8.4
Affected: 1.11.0
Affected: 1.9.1
Affected: 1.12.5
Affected: 2.0.2
Affected: 1.1.0
Affected: 1.14.0
Affected: 2.4.0
Affected: 1.15.2
Affected: 1.16.0
Affected: 1.21.0
Affected: 1.22.2
Affected: 1.24.5
Affected: 1.19.0
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.