← Vulnerability feed

Vulnerability record · CVE-2025-21608 · published 18 February 2025

CVE-2025-21608: Meshtastic firmware exposure of resource to wrong sphere vulnerability

Meshtastic · Meshtastic Firmware

Meshtastic is an open source mesh networking solution. In affected firmware versions crafted packets over MQTT are able to appear as a DM in client to a node even though they were not decoded with PKC. This issue has been addressed in version 2.5.19 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

5.3 CVSS 4.0 Medium EPSS 0.37% · top 71.2% CWE-668 · Exposure of resource to wrong sphere
5.3CVSS 4.0 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

Meshtastic is an open source mesh networking solution. In affected firmware versions crafted packets over MQTT are able to appear as a DM in client to a node even though they were not decoded with PKC. This issue has been addressed in version 2.5.19 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/meshtastic/firmware/security/advisories/GHSA-c967-qc39-3hf5 Third Party Advisory

Track CVE-2025-21608 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-55293Meshtastic firmware improper authentication vulnerabilityMeshtastic 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…EPSS 0.44%9.8CVE-2025-24797Meshtastic firmware memory buffer overflow vulnerabilityMeshtastic is an open source mesh networking solution. A fault in the handling of mesh packets containing invalid protobuf data can result in an atta…EPSS 0.88%9.8CVE-2024-47078Meshtastic firmware improper authentication vulnerabilityMeshtastic is an open source, off-grid, decentralized, mesh network. Meshtastic uses MQTT to communicate over an internet connection to a shared or p…EPSS 0.46%9.5CVE-2025-52464Meshtastic firmware vulnerabilityMeshtastic is an open source mesh networking solution. In versions from 2.5.0 to before 2.6.11, the flashing procedure of several hardware vendors wa…EPSS 0.58%8.2CVE-2025-55292Meshtastic firmware vulnerabilityMeshtastic is an open source mesh networking solution. In the current Meshtastic architecture, a Node is identified by their NodeID, generated from t…EPSS 0.15%8.0CVE-2025-53637Meshtastic firmware os command injection vulnerabilityMeshtastic is an open source mesh networking solution. The main_matrix.yml GitHub Action is triggered by the pull_request_target event, which has ext…EPSS 0.36%7.5CVE-2026-42566Meshtastic firmware improper input validation vulnerabilityMeshtastic is an open source mesh networking solution. Prior to version 2.7.23.b246bcd, a single node advertising a User.long_name that contains a ma…EPSS 0.49%7.5CVE-2024-51500Meshtastic firmware vulnerabilityMeshtastic firmware is a device firmware for the Meshtastic project. The Meshtastic firmware does not check for packets claiming to be from the speci…EPSS 0.42%

Source: NIST National Vulnerability Database (record CVE-2025-21608), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.