What is CVE-2026-20213?

CVE-2026-20213 is a high-severity vulnerability in Cisco Secure Endpoint, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-07-01.

How severe is CVE-2026-20213?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Cisco Secure Endpoint

CVE-2026-20213

A vulnerability in the PE 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 vulnerabil…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Cisco Secure Endpoint — versions 7.0.5, 6.2.19, 7.3.3

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

psirt@cisco.com

Frequently asked questions

What is CVE-2026-20213?: CVE-2026-20213 is a high-severity vulnerability in Cisco Secure Endpoint, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-07-01.
How severe is CVE-2026-20213?: High severity. CVSS v3 base score is 7.5 out of 10.