CVE-2025-55293CRITICAL 9.8EPSS p31.4%

CVE-2025-55293CVE-2025-55293

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.40% probability of exploitation · percentile 31.4% · 2026-06-18T12:00:27Z
Published2025-08-18
Last modified2025-10-17

Underlying weaknesses· 1

CWE-287

References

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

1

TypeTargetConfidenceTier
WeaknessImproper Authenticationcwe-2870%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2025-55292
CVE
CVE-2025-52464
CVE
CVE-2025-24797
CVE
CVE-2025-53637
CVE
CVE-2025-25306
CVE
CVE-2025-3757
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.