MEDIUM CVSS 4.9
Published: 2026-02-11

CVE-2025-59386

qnap quts_hero Security Advisory (CVE-2025-59386)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-59386 impacting qnap quts_hero. Evaluated with CVSS Base Score of 4.9 (MEDIUM).

Original NVD Description

Source: NIST NVD
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following version: QuTS hero h5.3.2.3354 build 20251225 and later

📊 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
High (PR:H)
Administrative credentials required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
None (I:N)
No system modification impact
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product qnap / quts_hero
Affected Versions h5.3.0.3115
Weakness Enumeration CWE-476

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-2025-59386 impacting qnap quts_hero.

⚡ Nuclei Detection Template (YAML) cve-2025-59386.yaml
id: cve-2025-59386

info:
  name: qnap quts_hero - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2025-59386 affecting qnap quts_hero.
    Evaluation: A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrat...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-59386
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
    cvss-score: 4.9
    cve-id: CVE-2025-59386
    cwe-id: CWE-476
  tags: cve,cve-2025-59386,qnap,quts_hero,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "quts_hero"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-59386.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-59386
# Target: qnap quts_hero | CVSS: 4.9 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-59386 (qnap quts_hero)...")
    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 qnap quts_hero scope (h5.3.0.3115).")
        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-2025-59386.sh
# Recommended Remediation & Patching Commands for CVE-2025-59386
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install quts_hero 2>/dev/null || \
sudo dnf upgrade quts_hero 2>/dev/null || \
sudo yum update quts_hero

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

# 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

Authorities
  • No records filed in this category.
Distributions
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❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2025-59386 in qnap quts_hero?

Review vendor-specific security notices and update qnap quts_hero 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-2025-59386?

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-2025-59386?

CVE-2025-59386 is classified with a CVSS 3.1 Base Score of 4.9 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
4.9
MEDIUM SEVERITY
CVE ID CVE-2025-59386
Weakness CWE-476
Vendor qnap
Product quts_hero
Published 2026-02-11
Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H