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CVE-2025-20234— ClamAV UDF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

Quick assessment

Affected
Cisco Cisco Secure Endpoint
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ClamAV（Clam AntiVirus）是ClamAV团队的一套免费且开源的杀毒软件。该软件用于检测木马、病毒、恶意软件和其他恶意威胁。 ClamAV（Clam AntiVirus）存在缓冲区错误漏洞，该漏洞源于UDF文件扫描期间内存过度读取，可能导致拒绝服务攻击。

CVSS 5.3 · Medium EPSS 0.82% · P56

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-20234

Vulnerability Information
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Vulnerability Title
ClamAV UDF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
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 .
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
ClamAV 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ClamAV（Clam AntiVirus）是ClamAV团队的一套免费且开源的杀毒软件。该软件用于检测木马、病毒、恶意软件和其他恶意威胁。 ClamAV（Clam AntiVirus）存在缓冲区错误漏洞，该漏洞源于UDF文件扫描期间内存过度读取，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Secure Endpoint 7.0.5 -

II. Public POCs for CVE-2025-20234

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III. Intelligence Information for CVE-2025-20234

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Same Patch Batch · Cisco · 2025-06-18 · 3 CVEs total

CVE-2025-20260 9.8 CRITICAL ClamAV PDF Scanning Buffer Overflow Vulnerability
CVE-2025-20271 8.6 HIGH Cisco Meraki MX and Z Series AnyConnect VPN with Client Certificate Authentication Denial

IV. Related Vulnerabilities

Same product: Cisco Secure Endpoint
Same vendor: Cisco
Same weakness: CWE-125

V. Comments for CVE-2025-20234

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