CVE-2025-20234: ClamAV UDF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability
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 .
Classification
CVE ID: CVE-2025-20234
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Problem Types
Out-of-bounds ReadAffected Products
Vendor: Cisco
Product: Cisco Secure Endpoint
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.07% (probability of being exploited)
EPSS Percentile: 20.54% (scored less or equal to compared to others)
EPSS Date: 2025-06-23 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-20234https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-udf-hmwd9nDy
https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html