---
id: CVE-2025-53399
title: >-
  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 confi…
summary: >-
  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 confi…
severity: none
cwe:
  - CWE-346
published: '2025-08-01'
updated: '2026-07-21'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-53399'
references:
  - url: >-
      https://github.com/EnableSecurity/advisories/tree/master/ES2025-01-rtpengine-improper-behavior-bleed-inject
    label: cve@mitre.org
  - url: 'https://github.com/sipwise/rtpengine/commits/rfuchs/security/'
    label: cve@mitre.org
  - url: 'https://github.com/sipwise/rtpengine/releases/tag/mr13.4.1.1'
    label: cve@mitre.org
  - url: 'https://www.openwall.com/lists/oss-security/2025/07/31/1'
    label: cve@mitre.org
  - url: 'http://seclists.org/fulldisclosure/2025/Aug/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2025/07/31/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2026/07/msg00033.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.06244
epssPercentile: 0.93243
ingestedAt: '2026-07-21T19:53:39.311Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.