CVE-2025-49087: Trustedfirmware Mbed TLS

Low severity, CVSS 3.7. EPSS: 0.4% chance of exploitation in the next 30 days.

In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used.

Affected products

• Trustedfirmware Mbed TLS: from 3.6.1, before 3.6.4 (fixed in 3.6.4)

Published 2025-07-20. Last modified 2026-06-17.