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CVE-2026-20214— ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerability

CVSS 7.5 · High EPSS 0.46% · P37

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

Affected Version Matrix 146

VendorProductVersion RangeStatus
CiscoCisco Secure Endpoint7.0.5affected
6.2.19affected
7.3.3affected
7.2.13affected
6.1.5affected
6.3.1affected
6.2.5affected
7.3.5affected
… +138 more rows
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I. Basic Information for CVE-2026-20214

Vulnerability Information
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Vulnerability Title
ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the FSG file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in FSG files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains portable executable content compressed with FSG to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Secure Endpoint 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Secure Endpoint是美国Cisco公司的一套集成了静态和动态恶意软件分析以及威胁情报于一体的终端应用程序。 Cisco Secure Endpoint存在缓冲区错误漏洞，该漏洞源于ClamAV的FSG文件格式解析器中边界检查不当可能导致越界缓冲区写入。
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

VendorProductAffected VersionsCPESubscribe
CiscoCisco Secure Endpoint 7.0.5 -

II. Public POCs for CVE-2026-20214

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III. Intelligence Information for CVE-2026-20214

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Vendor Advisories for CVE-2026-20214 (1)

Same Patch Batch · Cisco · 2026-07-01 · 8 CVEs total

CVE-2026-202437.5 HIGHClamAV ALZ Archive Processing Denial of Service Vulnerability
CVE-2026-202447.5 HIGHClamAV DMG File Processing Denial of Service Vulnerability
CVE-2026-202157.5 HIGHClamAV 7Zip File Format Processing Out-of-Bounds Memory Corruption Vulnerability
CVE-2026-202177.5 HIGHClamAV PESpin File Format Processing Out-of-Bounds Memory Corruption Vulnerability
CVE-2026-202167.5 HIGHClamAV InstallShield File Format Processing Resource Exhaustion Vulnerability
CVE-2026-202137.5 HIGHClamAV PE File Format Processing Out-of-Bounds Memory Corruption Vulnerability
CVE-2026-201917.5 HIGHCisco Catalyst Center Arbitrary File Read Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Secure Endpoint
Same vendor: Cisco
Same weakness: CWE-120

V. Comments for CVE-2026-20214

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