CVE-2025-49087

low-risk
Published 2025-07-20

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.

Do I need to act?

-
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
4
CVSS 4.0/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Affected Vendors

Arm

References (2)

Exploit https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-s...
Vendor Advisory https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/
18
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal