CVE-2025-49087
Published: 20 July 2025
Summary
CVE-2025-49087 is a medium-severity Covert Timing Channel (CWE-385) vulnerability in Trustedfirmware Mbed Tls. Its CVSS base score is 4.0 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Weaken Encryption (T1600); ranked in the top 37.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-22030
Vulnerability details
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.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The timing side-channel vulnerability in block cipher PKCS#7 padding removal enables attackers to recover plaintext from encrypted data, akin to padding oracle attacks (e.g., POODLE), facilitating the Weaken Encryption technique.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Directly targets covert timing channels by requiring identification and bandwidth estimation, enabling mitigation that reduces or eliminates their usability.