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) {', 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.

CVSS v3 9.4 CRITICAL

9.4^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/meshtastic/firmware/commit/cf7f0f9d0895602df3453a4f5cfea843f4e09744	Patch
https://github.com/meshtastic/firmware/pull/6372	Patch Issue Tracking
https://github.com/meshtastic/firmware/security/advisories/GHSA-95pq-gj5v-4fg2	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:meshtastic:meshtastic_firmware:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-08-18 18:15

Updated : 2025-10-17 17:48

NVD link : CVE-2025-55293

Mitre link : CVE-2025-55293

CVE.ORG link : CVE-2025-55293

JSON object : View

Products Affected

meshtastic

meshtastic_firmware

CWE

CWE-287

Improper Authentication

NVD-CWE-noinfo

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