MEDIUM CVSS 4.5
Published: 2026-04-06

CVE-2026-31062

utt 520w_firmware Security Advisory (CVE-2026-31062)
↗ Official NIST NVD Record
Seeking technical exploit breakdowns or verified PoC code for CVE-2026-31062?
🔬 Search Writeups & Exploit Archive →

CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-31062 impacting utt 520w_firmware. Evaluated with CVSS Base Score of 4.5 (MEDIUM).

Original NVD Description

Source: NIST NVD
UTT Aggressive 520W v3v1.7.7-180627 was discovered to contain a buffer overflow in the filename parameter of the formFtpServerDirConfig function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.

📊 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
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 utt / 520w_firmware
Affected Versions 1.7.7-180627
Weakness Enumeration CWE-120

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-2026-31062 impacting utt 520w_firmware.

⚡ Nuclei Detection Template (YAML) cve-2026-31062.yaml
id: cve-2026-31062

info:
  name: utt 520w_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2026-31062 affecting utt 520w_firmware.
    Evaluation: UTT Aggressive 520W v3v1.7.7-180627 was discovered to contain a buffer overflow in the filename parameter of the formFtpServerDirConfig function. This...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-31062
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
    cvss-score: 4.5
    cve-id: CVE-2026-31062
    cwe-id: CWE-120
  tags: cve,cve-2026-31062,utt,520w_firmware,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "520w_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-31062.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-31062
# Target: utt 520w_firmware | CVSS: 4.5 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-31062 (utt 520w_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 utt 520w_firmware scope (1.7.7-180627).")
        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-2026-31062.sh
# Recommended Remediation & Patching Commands for CVE-2026-31062
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install 520w_firmware 2>/dev/null || \
sudo dnf upgrade 520w_firmware 2>/dev/null || \
sudo yum update 520w_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i 520w_firmware 2>/dev/null || rpm -qa | grep -i 520w_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

Authorities
  • No records filed in this category.
Distributions
  • No records filed in this category.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-31062 in utt 520w_firmware?

Review vendor-specific security notices and update utt 520w_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-2026-31062?

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-2026-31062?

CVE-2026-31062 is classified with a CVSS 3.1 Base Score of 4.5 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
4.5
MEDIUM SEVERITY
CVE ID CVE-2026-31062
Weakness CWE-120
Vendor utt
Product 520w_firmware
Published 2026-04-06
Vector CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H