CVE-2025-52497

MEDIUM
Published Jul 4, 2025 Modified Nov 3, 2025 CWE-193

Description

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.

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CVSS v3.1 Score

4.8
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

Weakness Type (CWE)

CWE-193 CWE-193

Affected Products

Vendor Product
arm mbed_tls

References

Frequently Asked Questions

What is CVE-2025-52497? +
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. It has a CVSS v3.1 base score of 4.8 (MEDIUM).
How severe is CVE-2025-52497? +
CVE-2025-52497 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2025-52497? +
CVE-2025-52497 affects products from arm, specifically: mbed_tls. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-52497? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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