4.8
MEDIUM
CVE-2025-52497
Mbed TLS PEM Parsing Heap Buffer Underflow Vulnerability
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.

INFO

Published Date :

July 4, 2025, 3:15 p.m.

Last Modified :

July 17, 2025, 4 p.m.

Remotely Exploitable :

Yes !

Impact Score :

2.5

Exploitability Score :

2.2
Affected Products

The following products are affected by CVE-2025-52497 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Arm mbed_tls
1 Mbed mbedtls
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-52497.

URL Resource
https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-2.md Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-52497 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2025-52497 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jul. 17, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions up to (excluding) 3.6.4
    Added Reference Type MITRE: https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-2.md Types: Third Party Advisory
  • New CVE Received by [email protected]

    Jul. 04, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
    Added CWE CWE-193
    Added Reference https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-2.md
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-52497 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-52497 weaknesses.

CVSS31 - Vulnerability Scoring System
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