CVE-2021-41585: ATS stops accepting connections on FreeBSD

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-03 · updated 2026-06-17
Weakness: CWE-20

Description

Improper Input Validation vulnerability in accepting socket connections in Apache Traffic Server allows an attacker to make the server stop accepting new connections. This issue affects Apache Traffic Server 5.0.0 to 9.1.0.

Affected products

Apache Software Foundation Apache Traffic Server: from 8.0.0 through 8.1.2; from 9.0.0 through 9.1.0

References

https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164
https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164

Get alerted when CVE-2021-41585 or the next vulnerability affects your stack