CVE-2025-27810

4.8 mediumEPSS 0.3%

Medium (4.8). EPSS 0.3% chance of exploitation in the next 30 days.

Mbed TLS before 2.28.10 and 3.x before 3.6.3, in some cases of failed memory allocation or hardware errors, uses uninitialized stack memory to compose the TLS Finished message, potentially leading to authentication bypasses such as replays.

Severity

CVSS 3.1

4.8 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE: CWE-908
Published: 2025-03-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

arm:mbed_tls
trustedfirmware:mbed_tls

References

https://github.com/Mbed-TLS/mbedtls/releases
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2025-03-2/

Check your stack JSON