CVE-2025-55293 | THREATINT

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.

PUBLISHED Reserved 2025-08-12 | Published 2025-08-18 | Updated 2025-08-18 | Assigner GitHub_M

CRITICAL: 9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Problem types

CWE-287: Improper Authentication

Product status

< 2.6.3

affected

References

github.com/...rmware/security/advisories/GHSA-95pq-gj5v-4fg2

github.com/meshtastic/firmware/pull/6372

github.com/...ommit/cf7f0f9d0895602df3453a4f5cfea843f4e09744

cve.org (CVE-2025-55293)

nvd.nist.gov (CVE-2025-55293)

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