Vulnerability in Arm Mbed TLS
CVE-2025-54764
Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
Weakness classification (CWE)
References
- mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/ (Vendor Advisory)
- mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory… (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-54764?
- CVE-2025-54764 is a medium-severity vulnerability in Arm Mbed TLS, classified under CWE-208. CVSS score: 6.2/10. Published 2025-10-20.
- How severe is CVE-2025-54764?
- Medium severity. CVSS v3 base score is 6.2 out of 10.