What is CVE-2025-55293?

CVE-2025-55293 is a critical-severity vulnerability in Meshtastic Firmware, classified under Improper Authentication. CVSS score: 9.4/10. Published 2025-08-18.

How severe is CVE-2025-55293?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Is CVE-2025-55293 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Meshtastic Firmware

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 new key. First sending a empty key bypasses 'if (p.public_key.size > 0) {', cleari…

Vulnerability class: Broken Authentication

EPSS: 0.001 (26.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

Affected products

Meshtastic Firmware — versions < 2.6.3

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

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

Frequently asked questions

What is CVE-2025-55293?: CVE-2025-55293 is a critical-severity vulnerability in Meshtastic Firmware, classified under Improper Authentication. CVSS score: 9.4/10. Published 2025-08-18.
How severe is CVE-2025-55293?: Critical severity. CVSS v3 base score is 9.4 out of 10.
Is CVE-2025-55293 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.