CVE-2025-52497

4.8 mediumEPSS 0.3%

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

Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtls_pem_read_buffer and two mbedtls_pk_parse functions, via untrusted PEM input.

Severity

CVSS 3.1

4.8 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-31)
CWE: CWE-193
Published: 2025-07-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

arm:mbed_tls

References

https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-2.md
https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html

Check your stack JSON