Medium severity · published Aug 28, 2025
CVE-2025-54995
Asterisk is an open source private branch exchange and telephony toolkit
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Asterisk · Sangoma
before 18.26.4 · source: NVD
CA
Certified Asterisk · Sangoma
before 18.9; 18.9; 18.9; 18.9; 18.9; 18.9; +14 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-54995
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-54995
Patch
https://github.com/asterisk/asterisk/commit/0278f5bde14565c6838a6ec39bc21aee0cde56a9
Patch
https://github.com/asterisk/asterisk/commit/eafcd7a451dcd007dddf324ac37dd55a4808338d
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
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/10/msg00006.html
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