Vulnerability Description
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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Meshtastic | Meshtastic Firmware | < 2.6.3 |
Related Weaknesses (CWE)
References
- https://github.com/meshtastic/firmware/commit/cf7f0f9d0895602df3453a4f5cfea843f4Patch
- https://github.com/meshtastic/firmware/pull/6372Issue TrackingPatch
- https://github.com/meshtastic/firmware/security/advisories/GHSA-95pq-gj5v-4fg2Vendor Advisory
FAQ
What is CVE-2025-55293?
CVE-2025-55293 is a vulnerability with a CVSS score of 9.4 (CRITICAL). 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...
How severe is CVE-2025-55293?
CVE-2025-55293 has been rated CRITICAL with a CVSS base score of 9.4/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-55293?
Check the references section above for vendor advisories and patch information. Affected products include: Meshtastic Meshtastic Firmware.