CVE-2025-20260

ClamAV PDF Scanning Buffer Overflow Vulnerability

Published: Jun 18, 2025Updated: Nov 3, 2025 Sources: CVE List NVD BDU csafCWE-122

9.8CRITICAL

Description

ClamAV is an open source antivirus maintained by Cisco. A heap-based buffer overflow vulnerability in the PDF scanning process of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service or possibly execute arbitrary code.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-122

Affected Products

Cisco

commercial·USaka cisco systems, cisco systems inc.

ClamAV

Networking Infrastructure

clamav

oss-projectaka clambc

clamavOn-premSecurity Product

Security Products / vuln-mgmt-scanner

АО «ИВК»

commercial·RUaka ivk

АЛЬТ СП 10On-premOS

Operating Systems / linux-distro

The ClamAV Team

oss-projectaka clamav, clam antivirus

Clam AntivirusOn-prem

Security Products / endpoint-av-edr

and 1 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

Official Patch Available

Is your org exposed to CVE-2025-20260?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Privilege Escalation

View detailed technique mapping

References

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-171-01.json

raw.githubusercontent.com

https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html

blog.clamav.net

https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html

lists.debian.org

and 3 more references View all →

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Exploit details & PoC links

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Nuclei scanner templates

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Full remediation guide

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