CVE-2026-20345

CVE Enrichment

CVSS: 7.5 HIGH
EPSS: 0.46%
EPSS Percentile: 39.10%
CISA KEV: Not listed

Description

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 08-Aug-2026 00:17
Last Modified: 24-Oct-2026 03:10
EPSS Date: 2026-10-24
CWE: CWE-121

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:N /
                            I:N /
                            A:H

References

[email protected]

Last enrichment sync: 03-Nov-2026 00:04
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

The security defects, tracked as CVE-2026-20337 to CVE-2026-20339 and CVE-2026-20345 to CVE-2026-20348, were discovered in ClamAV’s parsers for ZIP, GPT, PESpin, PDF, Mach-O, and XAR file formats. Cisco Warns of Seven ClamAV Flaws Affecting Secure Endpoint; Two Have Public PoCs

CVE (4)

Vendors (1)

Products (3)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.