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CVE-2026-20216— ClamAV InstallShield File Format Processing Resource Exhaustion 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.

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存在资源管理错误漏洞，该漏洞源于文件扫描过程中对临时资源处理不当，可能导致未经验证的远程攻击者通过提交特制的InstallShield文件，造成ClamAV扫描进程终止并暂时消耗系统资源，从而导致拒绝服务。

CVSS 7.5 · High EPSS 0.57% · P46

Affected Version Matrix 146

VendorProduct Version RangeStatus
Cisco Cisco Secure Endpoint 7.0.5 affected
6.2.19 affected
7.3.3 affected
7.2.13 affected
6.1.5 affected
6.3.1 affected
6.2.5 affected
7.3.5 affected
… +138 more rows
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I. Basic Information for CVE-2026-20216

Vulnerability Information
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Vulnerability Title
ClamAV InstallShield File Format Processing Resource Exhaustion Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the InstallShield file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper handling of temporary resources during file scanning. An attacker could exploit this vulnerability by submitting a crafted InstallShield file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process and temporarily consume available system resources, resulting in a DoS condition on the affected software.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Secure Endpoint 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于文件扫描过程中对临时资源处理不当，可能导致未经验证的远程攻击者通过提交特制的InstallShield文件，造成ClamAV扫描进程终止并暂时消耗系统资源，从而导致拒绝服务。
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-2026-20216

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III. Intelligence Information for CVE-2026-20216

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Vendor Advisories for CVE-2026-20216 (1)

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

CVE-2026-20191 7.5 HIGH Cisco Catalyst Center Arbitrary File Read Vulnerability
CVE-2026-20214 7.5 HIGH ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerability
CVE-2026-20213 7.5 HIGH ClamAV PE File Format Processing Out-of-Bounds Memory Corruption Vulnerability
CVE-2026-20217 7.5 HIGH ClamAV PESpin File Format Processing Out-of-Bounds Memory Corruption Vulnerability
CVE-2026-20215 7.5 HIGH ClamAV 7Zip File Format Processing Out-of-Bounds Memory Corruption Vulnerability
CVE-2026-20244 7.5 HIGH ClamAV DMG File Processing Denial of Service Vulnerability
CVE-2026-20243 7.5 HIGH ClamAV ALZ Archive Processing Denial of Service Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Secure Endpoint
Same vendor: Cisco
Same weakness: CWE-770

V. Comments for CVE-2026-20216

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