Resource exhaustion in Asterisk

CVE-2025-54995

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 18.26.4 and 18.9-cert17, RTP UDP ports and internal resources can leak due to a lack of session termination. This could result in leaks and resourc…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.004 (35.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-54995?
CVE-2025-54995 is a medium-severity vulnerability in Asterisk, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2025-08-28.
How severe is CVE-2025-54995?
Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-54995 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.