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Fencer Vulns
medium 5.3

CVE-2025-20128 json

ClamAV OLE2 File Format Decryption Denial of Service Vulnerability

published 2025-01-22 21 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-2155

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

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.

Patch / fix

  • cisco clam_antivirus 1.0.8-0, 1.4.2-0
  • cisco clamav 1.0.8-0, 1.4.2-0
  • clamav clamav 1.0.8-0, 1.4.2-0
  • clamavs clamav 1.0.8-0, 1.4.2-0
  • clam_anti-virus clamav 1.0.8-0, 1.4.2-0
  • cisco secure_endpoint 1.24.4, 1.25.1, 7.5.20, 8.4.3
  • clamav Debian 12 1.0.9+dfsg-1~deb12u1
  • clamav Debian 14, Debian 13 1.4.2+dfsg-1

debian advisories DEBIAN-CVE-2025-20128

  • clamav Ubuntu 24.04 LTS 1.0.8+dfsg-0ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2025-20128

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • clamav SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 1.4.2-150600.18.6.1
  • clamav SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 1.4.2-150200.8.3.1
  • clamav SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.4.2-3.36.1

suse advisories SUSE-SU-2025:0328-1SUSE-SU-2025:0327-1SUSE-SU-2025:0325-1

  • clamav openSUSE Tumbleweed 1.4.2-1.1

opensuse advisories openSUSE-SU-2025:14683-1

  • clamav Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 1.4.2-r0

alpine advisories ALPINE-CVE-2025-20128

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

1.81% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Cisco Cisco Secure Endpoint

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.