Home/CVE/Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 18.26.4 and 18.9-cert17, RTP
CVE

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

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.

MEDIUM · CVSS 6.5 EPSS 0.01416
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1286Improper Validation of Syntactic Correctness of Input
CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

3
sangoma asterisk< 18.26.4
sangoma certified asterisk< 18.9
sangoma certified asteriskall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-557q-795j-wfx2github.com
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD28 Aug 2025 · 03:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/asterisk/asterisk/commit/0278f5bde14565c6838a6ec39bc21aee0cde56a9Patch
https://github.com/asterisk/asterisk/commit/eafcd7a451dcd007dddf324ac37dd55a4808338dPatch
https://github.com/asterisk/asterisk/pull/1405Issue Tracking
https://github.com/asterisk/asterisk/pull/1406Issue Tracking
https://lists.debian.org/debian-lts-announce/2025/10/msg00006.html
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