Cyber Resilience

CVE-2025-53637

Medium

Published: 10 July 2025

Published
10 July 2025
Modified
22 August 2025
KEV Added
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Patch
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CVSS Score v3.1 4.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
EPSS Score 0.0023 45.6th percentile
Risk Priority 8 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-53637 is a medium-severity OS Command Injection (CWE-78) vulnerability in Meshtastic Meshtastic Firmware. Its CVSS base score is 4.1 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Unix Shell (T1059.004); ranked at the 45.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1195.002 Compromise Software Supply Chain Initial Access
Adversaries may manipulate application software prior to receipt by a final consumer for the purpose of data or system compromise.
attack.mitre.org →
T1677 Poisoned Pipeline Execution Execution
Adversaries may manipulate continuous integration / continuous development (CI/CD) processes by injecting malicious code into the build process.
attack.mitre.org →
Why these techniques?

Vulnerability enables command injection (T1059.004) in GitHub Actions shell code via unsafe interpolation of user-controlled inputs like branch names on pull_request_target trigger, facilitating poisoned pipeline execution (T1677) and software supply chain compromise (T1195.002) by injecting unauthorized code into the repository.

Affected Assets

meshtastic
meshtastic firmware
≤ 2.6.6

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References