CVE-2025-55293 – Meshtastic PublicKey Overwrite Vulnerability

The following table lists the changes that have been made to the
CVE-2025-55293 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.

  • New CVE Received
    by [email protected]

    Aug. 18, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
    Added CWE CWE-287
    Added Reference https://github.com/meshtastic/firmware/commit/cf7f0f9d0895602df3453a4f5cfea843f4e09744
    Added Reference https://github.com/meshtastic/firmware/pull/6372
    Added Reference https://github.com/meshtastic/firmware/security/advisories/GHSA-95pq-gj5v-4fg2
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