CVE-2025-24798: Meshtastic crashes via an unimplemented routing module reply

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-07-10 · updated 2026-06-17
Weakness: CWE-617

Description

Meshtastic is an open source mesh networking solution. From 1.2.1 until 2.6.2, a packet sent to the routing module that contains want_response==true causes a crash. This can lead to a degradation of service for nodes within range of a malicious sender, or via MQTT if downlink is enabled. This vulnerability is fixed in 2.6.2.

Affected products

meshtastic firmware: from 1.2.1 before 2.6.2 — fixed in 2.6.2

How to fix

Upgrade to a fixed version: meshtastic firmware 2.6.2. Check the vendor advisory for mitigations.

References

https://github.com/meshtastic/firmware/blob/cdcbf4c61550e45c125e17a20aff4275e9389655/src/modules/RoutingModule.cpp#L44-L48
https://github.com/meshtastic/firmware/commit/dc100e4d3e3dfbf58d3ead8141a49cddb0cbdc19
https://github.com/meshtastic/firmware/security/advisories/GHSA-4q84-546j-3mf5

Get alerted when CVE-2025-24798 or the next vulnerability affects your stack