CVE-2025-54995

Asterisk remotely exploitable leak of RTP UDP ports and internal resources

MEDIUM
6.5
CVSS Score
Published: August 28, 2025 at 03:08 PM UTC
Updated: June 17, 2026 at 09:41 AM UTC
3 products affected across 2 vendorsAsteriskCertified AsteriskAsterisk

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 18.26.4
v < 18.26.4v < 18.9-cert17
Affected range stops below 18.26.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.9-cert17, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400CWE-1286

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