HIGH CVSS 8.8
Published: 2026-03-08

CVE-2026-3701

h3c magic_b1_firmware Security Advisory (CVE-2026-3701)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-3701 impacting h3c magic_b1_firmware. Evaluated with CVSS Base Score of 8.8 (HIGH).

Original NVD Description

Source: NIST NVD
A security vulnerability has been detected in H3C Magic B1 up to 100R004. Affected by this vulnerability is the function Edit_BasicSSID_5G of the file /goform/aspForm. Such manipulation of the argument param leads to buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

📊 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 h3c / magic_b1_firmware
Affected Versions *
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-2026-3701 impacting h3c magic_b1_firmware.

⚡ Nuclei Detection Template (YAML) cve-2026-3701.yaml
id: cve-2026-3701

info:
  name: h3c magic_b1_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2026-3701 affecting h3c magic_b1_firmware.
    Evaluation: A security vulnerability has been detected in H3C Magic B1 up to 100R004. Affected by this vulnerability is the function Edit_BasicSSID_5G of the file...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-3701
  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-2026-3701
    cwe-id: CWE-119
  tags: cve,cve-2026-3701,h3c,magic_b1_firmware,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "magic_b1_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-3701.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-3701
# Target: h3c magic_b1_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-2026-3701 (h3c magic_b1_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 h3c magic_b1_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-2026-3701.sh
# Recommended Remediation & Patching Commands for CVE-2026-3701
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install magic_b1_firmware 2>/dev/null || \
sudo dnf upgrade magic_b1_firmware 2>/dev/null || \
sudo yum update magic_b1_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i magic_b1_firmware 2>/dev/null || rpm -qa | grep -i magic_b1_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-2026-3701 in h3c magic_b1_firmware?

Review vendor-specific security notices and update h3c magic_b1_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-2026-3701?

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-2026-3701?

CVE-2026-3701 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-2026-3701
Weakness CWE-119
Vendor h3c
Product magic_b1_firmware
Published 2026-03-08
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H