CVE-2026-34877 - Vulnerability Analysis

Overview

Mbed TLS 2.19.0 to 3.6.5 and 4.0.0 contain a remote code execution caused by insufficient protection of serialized SSL context or session structures due to incorrect use of privileged APIs, letting attackers induce memory corruption by modifying serialized structures, exploit requires ability to modify serialized structures.

Severity & Score

Impact

Attackers can induce memory corruption and execute arbitrary code remotely by modifying serialized SSL context or session structures.

Mitigation

Update to the latest version beyond 4.0.0.

References

• https://mbed-tls.readthedocs.io/en/latest/security-advisories/
• https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-serialized-data/

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Apr 3, 2026

🔴 CVE-2026-34877 - Critical (9.8) An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection of serialized SSL context or session structures allows an attacker who can modify the serialized structures to induce memory corruption, ... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-34877/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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