MEDIUM CVSS 4.1
Published: 2025-07-10

CVE-2025-53637

meshtastic meshtastic_firmware Security Advisory (CVE-2025-53637)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-53637 impacting meshtastic meshtastic_firmware. Evaluated with CVSS Base Score of 4.1 (MEDIUM).

Original NVD Description

Source: NIST NVD
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.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
Low (PR:L)
Standard user access required
User Interaction
Required (UI:R)
User must click or open resource
Scope
Changed (S:C)
Impacts components beyond caller authority
Confidentiality
Low (C:L)
Partial information leakage
Integrity
None (I:N)
No system modification impact
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product meshtastic / meshtastic_firmware
Affected Versions *
Weakness Enumeration CWE-78

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2025-53637 impacting meshtastic meshtastic_firmware.

⚡ Nuclei Detection Template (YAML) cve-2025-53637.yaml
id: cve-2025-53637

info:
  name: meshtastic meshtastic_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2025-53637 affecting meshtastic meshtastic_firmware.
    Evaluation: Meshtastic is an open source mesh networking solution. The main_matrix.yml GitHub Action is triggered by the pull_request_target event, which has exte...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-53637
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
    cvss-score: 4.1
    cve-id: CVE-2025-53637
    cwe-id: CWE-78
  tags: cve,cve-2025-53637,meshtastic,meshtastic_firmware,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "meshtastic_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-53637.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-53637
# Target: meshtastic meshtastic_firmware | CVSS: 4.1 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-53637 (meshtastic meshtastic_firmware)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against meshtastic meshtastic_firmware scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2025-53637.sh
# Recommended Remediation & Patching Commands for CVE-2025-53637
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install meshtastic_firmware 2>/dev/null || \
sudo dnf upgrade meshtastic_firmware 2>/dev/null || \
sudo yum update meshtastic_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i meshtastic_firmware 2>/dev/null || rpm -qa | grep -i meshtastic_firmware

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

🔗 Verified Technical References

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2025-53637 in meshtastic meshtastic_firmware?

Review vendor-specific security notices and update meshtastic meshtastic_firmware packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2025-53637?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2025-53637?

CVE-2025-53637 is classified with a CVSS 3.1 Base Score of 4.1 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
4.1
MEDIUM SEVERITY
CVE ID CVE-2025-53637
Weakness CWE-78
Vendor meshtastic
Product meshtastic_firmware
Published 2025-07-10
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N