CVE-2026-20243
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
75/100
Published: 2026-07-01
Modified: 2026-10-25
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
A vulnerability in the ALZ 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 ALZ 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 ALZ 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.
Weakness Classification (1)
Affected Software (4)
| Vendor | Product | Version |
|---|---|---|
| cisco | secure_endpoint | < 1.27.2 |
| cisco | secure_endpoint | < 1.29.0 |
| cisco | secure_endpoint | < 8.6.2 |
| clamav | clamav | 1.4.0 – 1.4.5 |
References & Advisories (1)
Vendor Advisory