HIGH CVSS 7.2
Published: 2026-02-20

CVE-2026-2847

utt 520_firmware Security Advisory (CVE-2026-2847)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-2847 impacting utt 520_firmware. Evaluated with CVSS Base Score of 7.2 (HIGH).

Original NVD Description

Source: NIST NVD
A vulnerability was detected in UTT HiPER 520 1.7.7-160105. Affected is the function sub_44EFB4 of the file /goform/formReleaseConnect of the component Web Management Interface. The manipulation of the argument Isp_Name results in os command injection. The attack can be launched remotely. The exploit is now public and may be used.

📊 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
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 utt / 520_firmware
Affected Versions 1.7.7-160105
Weakness Enumeration CWE-77

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-2026-2847 impacting utt 520_firmware.

⚡ Nuclei Detection Template (YAML) cve-2026-2847.yaml
id: cve-2026-2847

info:
  name: utt 520_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2026-2847 affecting utt 520_firmware.
    Evaluation: A vulnerability was detected in UTT HiPER 520 1.7.7-160105. Affected is the function sub_44EFB4 of the file /goform/formReleaseConnect of the componen...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-2847
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 7.2
    cve-id: CVE-2026-2847
    cwe-id: CWE-77
  tags: cve,cve-2026-2847,utt,520_firmware,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "520_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-2847.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-2847
# Target: utt 520_firmware | CVSS: 7.2 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-2847 (utt 520_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 520_firmware scope (1.7.7-160105).")
        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-2026-2847.sh
# Recommended Remediation & Patching Commands for CVE-2026-2847
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install 520_firmware 2>/dev/null || \
sudo dnf upgrade 520_firmware 2>/dev/null || \
sudo yum update 520_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i 520_firmware 2>/dev/null || rpm -qa | grep -i 520_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
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Distributions
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❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-2847 in utt 520_firmware?

Review vendor-specific security notices and update utt 520_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-2026-2847?

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-2026-2847?

CVE-2026-2847 is classified with a CVSS 3.1 Base Score of 7.2 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.2
HIGH SEVERITY
CVE ID CVE-2026-2847
Weakness CWE-77
Vendor utt
Product 520_firmware
Published 2026-02-20
Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H