CVE-2025-55293

critical · 9.4

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.

9.4

CVSS

0.4%

EPSS (exploit prob.)

36th

EPSS percentile

2025-08-18

Published

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

Weaknesses

CWE-287

Affected products

Vendor	Product	Affected versions
meshtastic	meshtastic_firmware	< 2.6.3

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-55293