---
cve: "CVE-2025-52497"
severity: "MEDIUM"
cvss: 4.8
epss: "28%"
vendor: "Mbed"
kev: false
exploited: false
published: "2025-07-04 15:15:22"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T06:57:39+02:00"
---

# CVE-2025-52497

> 4.8 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- c765c831e5c2a0971410692f92f7a81d6ec65ec2 (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-52497) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_