CVE-2025-20128

ClamAV OLE2 File Format Decryption Denial of Service Vulnerability

Published Jan 22, 2025 CVSS 3.1 · 5.3 Medium EPSS 1.8% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Secure Endpoint

unknown

Version	Status	Constraints
`7.0.5`	affected	—
`6.2.19`	affected	—
`7.3.3`	affected	—
`7.2.13`	affected	—
`6.1.5`	affected	—
`6.3.1`	affected	—
`6.2.5`	affected	—
`7.3.5`	affected	—
`6.2.1`	affected	—
`7.2.7`	affected	—
`7.1.1`	affected	—
`6.3.5`	affected	—
`6.2.9`	affected	—
`7.3.1`	affected	—
`6.1.7`	affected	—
`7.2.11`	affected	—
`7.2.3`	affected	—
`7.1.5`	affected	—
`6.3.3`	affected	—
`7.3.9`	affected	—
`6.2.3`	affected	—
`6.1.9`	affected	—
`7.2.5`	affected	—
`6.3.7`	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	—
`1.12.1`	affected	—
`1.12.6`	affected	—
`1.14.0`	affected	—
`1.10.2`	affected	—
`1.12.2`	affected	—
`1.6.0`	affected	—
`1.11.0`	affected	—
`1.7.0`	affected	—
`1.13.0`	affected	—
`1.12.7`	affected	—
`1.8.4`	affected	—
`1.13.1`	affected	—
`1.9.0`	affected	—
`1.9.1`	affected	—
`1.12.5`	affected	—
`1.13.2`	affected	—
`8.1.7.21512`	affected	—
`8.1.7`	affected	—
`8.1.5`	affected	—
`8.1.3.21242`	affected	—
`8.1.3`	affected	—
`8.1.5.21322`	affected	—
`8.1.7.21417`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:clamav:clamav::::::::
	cpe:2.3:a:clamav:clamav::::::::

Configuration 2 [-]

OR	cpe:2.3:a:cisco:secure_endpoint::::::macos::*
	cpe:2.3:a:cisco:secure_endpoint::::::linux::*
	cpe:2.3:a:cisco:secure_endpoint::::::windows::*
	cpe:2.3:a:cisco:secure_endpoint::::::windows::*
	cpe:2.3:a:cisco:secure_endpoint_private_cloud::::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4292-1	clamav security update
EUVD	EUVD-2025-2155	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.
Ubuntu USN	USN-7229-1	ClamAV vulnerability

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: 1.8% (1.815% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://blog.clamav.net/2025/01/clamav-142-and-108-security-patch.html
https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-ole2-H549rphA

History

Nov 3, 2025 7:30 PM Added references View changes

Type	Values Removed	Values Added
References		https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html

Aug 6, 2025 2:15 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco secure Endpoint Cisco secure Endpoint Private Cloud Clamav Clamav clamav
CPEs		cpe:2.3:a:cisco:secure_endpoint::::::linux::* cpe:2.3:a:cisco:secure_endpoint::::::macos::* cpe:2.3:a:cisco:secure_endpoint::::::windows::* cpe:2.3:a:cisco:secure_endpoint_private_cloud:::::::: cpe:2.3:a:clamav:clamav::::::::
Vendors & Products		Cisco Cisco secure Endpoint Cisco secure Endpoint Private Cloud Clamav Clamav clamav

Feb 18, 2025 8:45 PM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses	CWE-120

Jan 22, 2025 5:15 PM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-120
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jan 22, 2025 4:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		ClamAV OLE2 File Format Decryption Denial of Service Vulnerability
Weaknesses		CWE-122
References		https://blog.clamav.net/2025/01/clamav-142-and-108-security-patch.html https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-ole2-H549rphA
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}`