CVE-2021-43082: Apache Traffic Server

Critical severity, CVSS 9.8. EPSS: 2.4% chance of exploitation in the next 30 days.

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server allows an attacker to overwrite memory. This issue affects Apache Traffic Server 9.1.0.

Affected products

• Apache Traffic Server: from 8.0.0, up to and including 8.1.2; from 9.0.0, up to and including 9.1.0

Published 2021-11-03. Last modified 2026-06-17.