CVE-2025-54995

moderate-risk
Published 2025-08-28

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 resource exhaustion. This issue has been patched in versions 18.26.4 and 18.9-cert17.

Do I need to act?

-
0.99% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk
Certified Asterisk

Affected Vendors

Sangoma

References (6)

Patch https://github.com/asterisk/asterisk/commit/0278f5bde14565c6838a6ec39bc21aee0cde...
Patch https://github.com/asterisk/asterisk/commit/eafcd7a451dcd007dddf324ac37dd55a4808...
Issue Tracking https://github.com/asterisk/asterisk/pull/1405
Issue Tracking https://github.com/asterisk/asterisk/pull/1406
Exploit https://github.com/asterisk/asterisk/security/advisories/GHSA-557q-795j-wfx2
https://lists.debian.org/debian-lts-announce/2025/10/msg00006.html
47
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 3/34 · Minimal
Exposure 20/34 · Moderate