What’s Vulnerable › Vulnerabilities

CVE-2025-53399

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-01 · updated 2026-07-21
• Weakness: CWE-346

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.

Affected products

• Sipwise rtpengine: before 13.4.1.1 — fixed in 13.4.1.1

How to fix

Upgrade to a fixed version: Sipwise rtpengine 13.4.1.1. Check the vendor advisory for mitigations.

References

• 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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