How severe is CVE-2025-20128?

CVE-2025-20128 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-20128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20128?

CVE-2025-20128 primarily affects Cisco Secure Endpoint. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-20128?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-20128 have an EU (EUVD) identifier?

Yes. CVE-2025-20128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2155.

When was CVE-2025-20128 published?

CVE-2025-20128 was published on 2025-01-22 and last updated on 2026-06-17.

CVE-2025-20128

CVE-2025-20128 is a medium-severity vulnerability in Cisco Secure Endpoint with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2155
Weakness: CWE-122
Affected product: Cisco Secure Endpoint
Published: 2025-01-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-20128?: 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.
How severe is CVE-2025-20128?: CVE-2025-20128 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-20128 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20128?: CVE-2025-20128 primarily affects Cisco Secure Endpoint. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-20128?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20128 have an EU (EUVD) identifier?: Yes. CVE-2025-20128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2155.
When was CVE-2025-20128 published?: CVE-2025-20128 was published on 2025-01-22 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*
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_private_cloud:*:*:*:*:*:*:*:*

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