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: 0.004 (34.4th 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
- Meshtastic Meshtastic_firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, 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.