CVE-2025-27810

low-risk
Published 2025-03-25

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.

Do I need to act?

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0.10% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.4/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Affected Vendors

Arm

References (2)

Release Notes https://github.com/Mbed-TLS/mbedtls/releases
Vendor Advisory https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-a...
22
/ 100
low-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal