Is CVE-2025-20128 in the CISA KEV catalog?

No. CVE-2025-20128 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-20128?

CVE-2025-20128 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2025-20128?

CVE-2025-20128 has an EPSS score of 1.51% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-20128?

Upgrade clamav on debian 11 to 1.0.9+dfsg-1~deb11u1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2025-20128

MEDIUMEPSS 71th pctl

5.3

CVSS v3

NVD

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.

CWE-122Heap-based Buffer Overflow

How to fix

Remediation Available

clamavDebian

Fixed in:1.0.9+dfsg-1~deb11u1CVE-2025-20128

Fixed in:1.0.9+dfsg-1~deb12u1CVE-2025-20128

Fixed in:1.4.2+dfsg-1CVE-2025-20128

clamavUbuntu

Fixed in:1.0.8+dfsg-0ubuntu0.24.04.1USN-7229-1

ClamAVWindows application

Affected:1.1.0 1.4.2Fixed in:1.4.2Cisco Systems, Inc.

Affected:1.0.0 1.0.8Fixed in:1.0.8Cisco Systems, Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

1.51%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Vendor Advisory1

blog.clamav.net

Third-Party Advisory1

sec.cloudapps.cisco.com

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2024-26256	High	7.8	88%	-	Fix
CVE-2020-25687	Medium	5.9	87%	-	Fix
CVE-2009-3459	High	8.8	86%	KEV	Fix
CVE-2021-21017	High	8.8	86%	KEV	-
CVE-2020-25683	Medium	5.9	86%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.