---
cve: "CVE-2025-55293"
severity: "CRITICAL"
cvss: 9.4
epss: "42%"
vendor: "meshtastic"
kev: false
exploited: false
published: "2025-08-18 18:15:39"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T03:50:05+02:00"
---

# CVE-2025-55293

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

Meshtastic is an open source mesh networking solution. Prior to v2.6.3, an attacker can send NodeInfo with a empty publicKey first, then overwrite it with a new key. First sending a empty key bypasses 'if (p.public_key.size > 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info->user.public_key.size > 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.

## CVSS-Vektor

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

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

## Referenzen

- <https://github.com/meshtastic/firmware/security/advisories/GHSA-95pq-gj5v-4fg2>
- <https://github.com/meshtastic/firmware/pull/6372>
- <https://github.com/meshtastic/firmware/commit/cf7f0f9d0895602df3453a4f5cfea843f4e09744>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-55293) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_