VulnerabilityModified

CVE-2025-61581

** UNSUPPORTED WHEN ASSIGNED ** Inefficient Regular Expression Complexity vulnerability in Apache Traffic Control.

HIGH 7.5EPSS 0.69%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.69%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

** UNSUPPORTED WHEN ASSIGNED ** Inefficient Regular Expression Complexity vulnerability in Apache Traffic Control. This issue affects Apache Traffic Control: all versions. People with access to the management interface of the Traffic Router component could specify malicious patterns and cause unavailability. As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.69% probability · 51th percentile
CISA KEV: Not listed
Weakness: CWE-1333
Affected: apache/traffic control
Source: security@apache.org

References

https://lists.apache.org/thread/mx2jxgnlop2f4vbqnvmrldh4pqmobxvpMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/10/16/3

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.