CVE-2025-55293: 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…

PriorityP353critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.40%

31.6th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
meshtastic	firmware	< 2.6.3	2.6.3
meshtastic	meshtastic_firmware	< 2.6.3	2.6.3

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