Read the docs
TI-2025-34949 Aliases CVE-2025-55293

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

Priority HIGH 81CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00456 39th percentileScored 2026-11-07
Fix Fixed firmware (meshtastic): 2.6.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
meshtasticfirmwarebefore 2.6.32.6.3Patch availableCNA
  • firmware Vendormeshtastic Affected before 2.6.3 Fixed in 2.6.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:meshtastic:meshtastic_firmware:*:*:*:*:*:*:*:*before 2.6.3Vulnerablemeshtastic
  • cpe:2.3:o:meshtastic:meshtastic_firmware:*:*:*:*:*:*:*:* Versions before 2.6.3 Vulnerable ·meshtastic

Remediation

  • Fix · CNA firmware (meshtastic) Fixed in 2.6.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-55293

References

Patch 2

Advisory 1

  • TI-2025-34948 In Meshtastic, an attacker can spoof licensed amateur flag for a node CVSS 3.1HIGH 8.2
  • TI-2024-34421 Failure to check for packets from the broadcast address allows potential DDoS… CVSS 3.1HIGH 7.5
  • TI-2025-33563 Meshtastic allows Command Injection in GitHub Action CVSS 3.1HIGH 8.0
  • TI-2025-18515 Meshtastic crashes via an unimplemented routing module reply CVSS 3.1MEDIUM 6.5
  • TI-2025-33554 Meshtastic firmware allows forged DMs with no PKC to show up as encrypted CVSS 3.1MEDIUM 5.3
  • TI-2024-31447 Traceroute_APP responses are not rate-limited. CVSS 4.0LOW 2.7
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences