HIGH CVSS 8.8
Published: 2026-04-27

CVE-2026-7098

tenda f456_firmware Security Advisory (CVE-2026-7098)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-7098 impacting tenda f456_firmware. Evaluated with CVSS Base Score of 8.8 (HIGH).

Original NVD Description

Source: NIST NVD
A security vulnerability has been detected in Tenda F456 1.0.0.5. Impacted is the function fromDhcpListClient of the file /goform/DhcpListClient of the component httpd. Such manipulation of the argument page leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly 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
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 tenda / f456_firmware
Affected Versions 1.0.0.5
Weakness Enumeration CWE-119

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-2026-7098 impacting tenda f456_firmware.

⚡ Nuclei Detection Template (YAML) cve-2026-7098.yaml
id: cve-2026-7098

info:
  name: tenda f456_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2026-7098 affecting tenda f456_firmware.
    Evaluation: A security vulnerability has been detected in Tenda F456 1.0.0.5. Impacted is the function fromDhcpListClient of the file /goform/DhcpListClient of th...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-7098
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2026-7098
    cwe-id: CWE-119
  tags: cve,cve-2026-7098,tenda,f456_firmware,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "f456_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-7098.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-7098
# Target: tenda f456_firmware | CVSS: 8.8 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-7098 (tenda f456_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 tenda f456_firmware scope (1.0.0.5).")
        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-2026-7098.sh
# Recommended Remediation & Patching Commands for CVE-2026-7098
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install f456_firmware 2>/dev/null || \
sudo dnf upgrade f456_firmware 2>/dev/null || \
sudo yum update f456_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i f456_firmware 2>/dev/null || rpm -qa | grep -i f456_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-2026-7098 in tenda f456_firmware?

Review vendor-specific security notices and update tenda f456_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-2026-7098?

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-2026-7098?

CVE-2026-7098 is classified with a CVSS 3.1 Base Score of 8.8 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
8.8
HIGH SEVERITY
CVE ID CVE-2026-7098
Weakness CWE-119
Vendor tenda
Product f456_firmware
Published 2026-04-27
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H