CVE-2025-55293

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

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.

Category

9.4
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.05%
Affected: meshtastic firmware
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-55293?
CVE-2025-55293 has been scored as a critical severity vulnerability.
How to fix CVE-2025-55293?
To fix CVE-2025-55293, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-55293 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-55293 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-55293?
CVE-2025-55293 affects meshtastic firmware.
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