TI-2025-33563 Aliases CVE-2025-53637

Meshtastic allows Command Injection in GitHub Action

HIGH 68CWE-78Published 2025-07-10 · Updated 2025-07-11

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.

Summary

Meshtastic is an open source mesh networking solution. The main_matrix.yml GitHub Action is triggered by the pull_request_target event, which has extensive permissions, and can be initiated by an attacker who forked the repository and created a pull request. In the shell code execution part, user-controlled input is interpolated unsafely into the code. If this were to be exploited, attackers could inject unauthorized code into the repository. This vulnerability is fixed in 2.6.6.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00389 33rd percentileScored 2026-11-07

Fix Fixed firmware (meshtastic): 2.6.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
meshtastic	firmware	2.5.3 to before 2.6.6	2.6.6	Patch available	CNA

firmware Vendormeshtastic Affected 2.5.3 to before 2.6.6 Fixed in 2.6.6 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:meshtastic:meshtastic_firmware::::::::	before 2.6.6	Vulnerable	meshtastic

cpe:2.3:o:meshtastic:meshtastic_firmware:*:*:*:*:*:*:*:* Versions before 2.6.6 Vulnerable ·meshtastic

Remediation

Fix · CNA firmware (meshtastic) Fixed in 2.6.6

Timeline

2026-10-02 Threatist record created from CVE-2025-53637

References

Advisory 1

https://github.com/meshtastic/firmware/security/advisories/GHSA-6mwm-v2vv-pp96

Other 1

https://github.com/meshtastic/firmware/blob/3fd47d9713e7d1b6866c48cf218e2435741651a2/.github/workflows/main_matrix.yml#L34-L41

TI-2025-34949 Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB CVSS 3.1CRITICAL 9.8
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-2025-18515 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