HIGH CVSS 8.0
Published: 2026-01-07

CVE-2025-66620

columbiaweather weather_microserver_firmware Security Advisory (CVE-2025-66620)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-66620 impacting columbiaweather weather_microserver_firmware. Evaluated with CVSS Base Score of 8.0 (HIGH).

Original NVD Description

Source: NIST NVD
An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to MicroServer can gain limited shell access, enabling persistence through reverse shells, and the ability to modify or remove data stored in the file system.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Adjacent (AV:A)
Requires shared subnet / local network access
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
Low (PR:L)
Standard user access required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
High (C:H)
Total information disclosure
Integrity
High (I:H)
Total modification of target system
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product columbiaweather / weather_microserver_firmware
Affected Versions *
Weakness Enumeration CWE-553

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-2025-66620 impacting columbiaweather weather_microserver_firmware.

⚡ Nuclei Detection Template (YAML) cve-2025-66620.yaml
id: cve-2025-66620

info:
  name: columbiaweather weather_microserver_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2025-66620 affecting columbiaweather weather_microserver_firmware.
    Evaluation: An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-66620
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.0
    cve-id: CVE-2025-66620
    cwe-id: CWE-553
  tags: cve,cve-2025-66620,columbiaweather,weather_microserver_firmw,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "weather_microserver_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-66620.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-66620
# Target: columbiaweather weather_microserver_firmware | CVSS: 8.0 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-66620 (columbiaweather weather_microserver_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 columbiaweather weather_microserver_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-2025-66620.sh
# Recommended Remediation & Patching Commands for CVE-2025-66620
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install weather_microserver_firmw 2>/dev/null || \
sudo dnf upgrade weather_microserver_firmw 2>/dev/null || \
sudo yum update weather_microserver_firmw

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

# 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-2025-66620 in columbiaweather weather_microserver_firmware?

Review vendor-specific security notices and update columbiaweather weather_microserver_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-2025-66620?

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-2025-66620?

CVE-2025-66620 is classified with a CVSS 3.1 Base Score of 8.0 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
8.0
HIGH SEVERITY
CVE ID CVE-2025-66620
Weakness CWE-553
Vendor columbiaweather
Product weather_microserver_firmware
Published 2026-01-07
Vector CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H