Vulnerability Monitor

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CVE-2025-49087

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.

Published

2025-07-20T19:15:24.037

Last Modified

2025-08-07T01:21:40.363

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 4.0 (MEDIUM)

Weaknesses

Type: Secondary
CWE-385

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	arm	mbed_tls	< 3.6.4	Yes

References

https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-5.md Exploit, Third Party Advisory ([email protected])
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/ Vendor Advisory ([email protected])