CVE-2026-20337
ClamAV ZIP File Format Processing Memory Corruption Vulnerability
Severity
High 7.5
CVSS 3.1
Exploited
Not listed
EPSS
0.004
29.5th percentile
Discovered by
Third party
Vendor-published field
Published
Aug 7, 2026
Assigned by cisco
Description
A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper boundary checks for content in zip files during scanning, which may result in an out-of-bounds write condition. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Weakness: CWE-120
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Endpoint | Endpoint / EDR | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Secure Endpoint