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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
NVD MITRE
EPSS Score
1.6%
Top 26.7%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Self-Check
OpenVAS

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

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
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
Open in CVSS calculator →

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?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

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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