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CVE-2025-20128

ClamAV OLE2 File Format Decryption Denial of Service Vulnerability

Published: Jan 22, 2025Updated: Nov 3, 2025 Sources: CVE List NVD BDUCWE-122
5.3MEDIUM
NVD MITRE
EPSS Score
1.5%
Top 27.6%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available
Self-Check
OpenVAS

Description

A vulnerability in the Object Linking and Embedding 2 (OLE2) decryption routine of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an integer underflow in a bounds check that allows for a heap buffer overflow read. An attacker could exploit this vulnerability by submitting a crafted file containing OLE2 content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the . Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-122

Affected Products

Cisco Systems Inc.
commercial·USaka Cisco, cisco systems
Cisco Secure Endpoint
Networking Infrastructure
Clam Antivirus
Networking Infrastructure
Secure Endpoint Connector
Networking Infrastructure
Secure Endpoint Private Cloud
Networking Infrastructure
secure endpoint
Networking Infrastructure
clamav
oss-projectaka clambc
clamavOn-premSecurity Product
Security Products / vuln-mgmt-scanner
and 1 more affected products View all →

Exploitability

0 exploit sources identified

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

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-ole2-H549rphA
sec.cloudapps.cisco.com
https://blog.clamav.net/2025/01/clamav-142-and-108-security-patch.html
blog.clamav.net
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-ole2-H549rphA
sec.cloudapps.cisco.com
and 1 more references View all →

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