What is CVE-2025-21608?

CVE-2025-21608 is a medium-severity vulnerability in Meshtastic Firmware, classified under Exposure of Resource to Wrong Sphere. CVSS score: 5.3/10. Published 2025-02-18.

How severe is CVE-2025-21608?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Meshtastic Firmware

CVE-2025-21608

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 vers…

EPSS: 0.004 (28.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Meshtastic Firmware — versions >= 2.5.0, <= 2.5.18
Meshtastic Meshtastic_firmware

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2025-21608?: CVE-2025-21608 is a medium-severity vulnerability in Meshtastic Firmware, classified under Exposure of Resource to Wrong Sphere. CVSS score: 5.3/10. Published 2025-02-18.
How severe is CVE-2025-21608?: Medium severity. CVSS v3 base score is 5.3 out of 10.