AUGUST 16, 2026
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Case File

CVE-2026-20339

HIGH · CVSS 7.5 EPSS 0.33% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-07 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

A vulnerability in the PESpin file format parser of ClamAV allows unauthenticated remote attackers to exploit improper boundary checks, potentially leading to an integer overflow and memory corruption. This could result in a denial-of-service (DoS) condition, causing the ClamAV scanning process to terminate unexpectedly. Organizations using ClamAV should prioritize patching this vulnerability to mitigate the risk of service disruption.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-20339
Severity
HIGH
CVSS
7.5
EPSS
0.33%

Original NVD Description

A vulnerability in the PESpin 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 PESpin files during scanning, which may result in an integer overflow. An attacker could exploit this vulnerability by submitting a crafted file that contains PESpin 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.