CVE-2026-20348— ClamAV XAR File Format Processing Memory Corruption Vulnerability
Possible ATT&CK Techniques 2AI
T1203 · Exploitation for Client Execution T1499 · Endpoint Denial of ServiceAffected Version Matrix 146
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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-2026-20348
Vulnerability Information
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Vulnerability Title
ClamAV XAR File Format Processing Memory Corruption Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in XAR files during scanning. An attacker could exploit this vulnerability by submitting a crafted file that contains XAR content 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: 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
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
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是ClamAV组织开源的一套杀毒软件。该软件用于检测木马、病毒、恶意软件和其他恶意威胁。 ClamAV 存在缓冲区错误漏洞，该漏洞源于XAR文件格式解析器对文件内容边界检查不当，可能导致未经身份验证的远程攻击者提交特制文件造成内存损坏，进而导致拒绝服务。
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-2026-20348
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-20348 (1)
Same Patch Batch · Cisco · 2026-08-07 · 7 CVEs total
| CVE-2026-20345 | 7.5 HIGH | ClamAV GPT File Format Processing Memory Corruption Vulnerability |
| CVE-2026-20339 | 7.5 HIGH | ClamAV PESpin File Format Processing Integer Overflow Vulnerability |
| CVE-2026-20347 | 7.5 HIGH | ClamAV Mach-O File Format Processing Memory Corruption Vulnerability |
| CVE-2026-20346 | 7.5 HIGH | ClamAV PDF File Format Processing Memory Corruption Vulnerability |
| CVE-2026-20338 | 7.5 HIGH | ClamAV ZIP File Format Processing Memory Corruption Vulnerability |
| CVE-2026-20337 | 7.5 HIGH | ClamAV ZIP File Format Processing Memory Corruption Vulnerability |
IV. Related Vulnerabilities
Same product: Cisco Secure Endpoint
- CVE-2026-20345
ClamAV GPT File Format Processing Memory Corruption Vulnerab - CVE-2026-20339
ClamAV PESpin File Format Processing Integer Overflow Vulner - CVE-2026-20347
ClamAV Mach-O File Format Processing Memory Corruption Vulne - CVE-2026-20346
ClamAV PDF File Format Processing Memory Corruption Vulnerab - CVE-2026-20338
ClamAV ZIP File Format Processing Memory Corruption Vulnerab
Same vendor: Cisco
- CVE-2026-20349
Cisco Secure Firewall Adaptive Security Appliance and Secure - CVE-2026-20345
ClamAV GPT File Format Processing Memory Corruption Vulnerab - CVE-2026-20339
ClamAV PESpin File Format Processing Integer Overflow Vulner - CVE-2026-20347
ClamAV Mach-O File Format Processing Memory Corruption Vulne - CVE-2026-20346
ClamAV PDF File Format Processing Memory Corruption Vulnerab
Same weakness: CWE-120
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V. Comments for CVE-2026-20348
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