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Vulnerability record · CVE-2025-53399 · published 1 August 2025

CVE-2025-53399: Origin validation error vulnerability

In Sipwise rtpengine before 13.4.1.1, an origin-validation error in the endpoint-learning logic of the media-relay core allows remote attackers to inject or intercept RTP/SRTP media streams via RTP packets (except when the relay is configured for strict source and learning disabled). Version 13.4.1.1 fixes the heuristic mode by limiting exposure to the first five packets, and introduces a recrypt flag that fully prevents SRTP attacks when both mitigations are enabled.

6.9 CVSS 4.0 Medium EPSS 6.2% · top 6.7% CWE-346 · Origin validation error Deferred
6.9CVSS 4.0 base score
6.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
21 Jul 2026Last modified by NVD

Description

In Sipwise rtpengine before 13.4.1.1, an origin-validation error in the endpoint-learning logic of the media-relay core allows remote attackers to inject or intercept RTP/SRTP media streams via RTP packets (except when the relay is configured for strict source and learning disabled). Version 13.4.1.1 fixes the heuristic mode by limiting exposure to the first five packets, and introduces a recrypt flag that fully prevents SRTP attacks when both mitigations are enabled.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/EnableSecurity/advisories/tree/master/ES2025-01-rtpengine-improper-behavior-bleed-inject
https://github.com/sipwise/rtpengine/commits/rfuchs/security/
https://github.com/sipwise/rtpengine/releases/tag/mr13.4.1.1
https://www.openwall.com/lists/oss-security/2025/07/31/1
http://seclists.org/fulldisclosure/2025/Aug/1
http://www.openwall.com/lists/oss-security/2025/07/31/1
https://lists.debian.org/debian-lts-announce/2026/07/msg00033.html

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Source: NIST National Vulnerability Database (record CVE-2025-53399), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.