What’s Vulnerable › Vulnerabilities

CVE-2025-49087

• Severity: low (CVSS 3.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-20 · updated 2026-06-17
• Weakness: CWE-385

Description

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

How to fix

Upgrade to a fixed version: TrustedFirmware Mbed TLS 3.6.4. Check the vendor advisory for mitigations.

References

• https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-5.md
• https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/

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