CVE-2025-20234
CVE-2025-20234 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-125.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-27685
- Weakness: CWE-125
- Affected product: Cisco Secure Endpoint
- Published:
- Last modified:
Description
A vulnerability in Universal Disk Format (UDF) processing 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 a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF 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 .
Frequently asked questions
- What is CVE-2025-20234?
- A vulnerability in Universal Disk Format (UDF) processing 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 a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF 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 .
- How severe is CVE-2025-20234?
- CVE-2025-20234 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-2025-20234 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-20234?
- CVE-2025-20234 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-2025-20234?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-20234 have an EU (EUVD) identifier?
- Yes. CVE-2025-20234 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27685.
- When was CVE-2025-20234 published?
- CVE-2025-20234 was published on 2025-06-18 and last updated on 2026-06-17.
References
- https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-udf-hmwd9nDy
Affected products (5)
- cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*
- 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:*:*:*:*:*:*:*:*
More vulnerabilities in Cisco Secure Endpoint
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- CVE-2022-20770 — High (CVSS 8.6): On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier and 0.104.2…
- CVE-2026-20215 — High (CVSS 7.5): A vulnerability in the 7z file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS…
- CVE-2026-20214 — High (CVSS 7.5): A vulnerability in the FSG file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS…
- CVE-2026-20213 — High (CVSS 7.5): A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS…
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