CVE-2025-49087

Public Exploit

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.

Category

4.0
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory readthedocs.io
Affected: Mbed mbedtls
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-49087?
CVE-2025-49087 has been scored as a medium severity vulnerability.
How to fix CVE-2025-49087?
To fix CVE-2025-49087, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-49087 being actively exploited in the wild?
It is possible that CVE-2025-49087 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-49087?
CVE-2025-49087 affects Mbed mbedtls.
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