CVE-2025-55293

Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB

Published Aug 18, 2025 CVSS 3.1 · 9.4 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-25140 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.
History
Type Values Removed Values Added
First Time appeared Meshtastic meshtastic Firmware
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:o:meshtastic:meshtastic_firmware:*:*:*:*:*:*:*:*
Vendors & Products Meshtastic meshtastic Firmware
Type Values Removed Values Added
First Time appeared Meshtastic
Meshtastic firmware
Vendors & Products Meshtastic
Meshtastic firmware
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 9.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 18, 2025, 5:41 PM
Reserved
Aug 12, 2025, 4:15 PM
Status
Analyzed
Published
Aug 18, 2025, 6:15 PM
Modified
Jun 17, 2026, 9:41 AM