MEDIUM CVSS 5.3
Published: 2026-02-06

CVE-2026-2055

dlink dir-605l_firmware Security Advisory (CVE-2026-2055)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-2055 impacting dlink dir-605l_firmware. Evaluated with CVSS Base Score of 5.3 (MEDIUM).

Original NVD Description

Source: NIST NVD
A weakness has been identified in D-Link DIR-605L and DIR-619L 2.06B01/2.13B01. The affected element is an unknown function of the component DHCP Client Information Handler. Executing a manipulation can lead to information disclosure. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.

📊 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
None (PR:N)
Unauthenticated execution
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
Low (C:L)
Partial information leakage
Integrity
None (I:N)
No system modification impact
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product dlink / dir-605l_firmware
Affected Versions 2.06b01
Weakness Enumeration CWE-200

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-2026-2055 impacting dlink dir-605l_firmware.

⚡ Nuclei Detection Template (YAML) cve-2026-2055.yaml
id: cve-2026-2055

info:
  name: dlink dir-605l_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2026-2055 affecting dlink dir-605l_firmware.
    Evaluation: A weakness has been identified in D-Link DIR-605L and DIR-619L 2.06B01/2.13B01. The affected element is an unknown function of the component DHCP Clie...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-2055
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2026-2055
    cwe-id: CWE-200
  tags: cve,cve-2026-2055,dlink,dir-605l_firmware,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "dir-605l_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-2055.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-2055
# Target: dlink dir-605l_firmware | CVSS: 5.3 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-2055 (dlink dir-605l_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 dlink dir-605l_firmware scope (2.06b01).")
        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-2026-2055.sh
# Recommended Remediation & Patching Commands for CVE-2026-2055
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install dir-605l_firmware 2>/dev/null || \
sudo dnf upgrade dir-605l_firmware 2>/dev/null || \
sudo yum update dir-605l_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i dir-605l_firmware 2>/dev/null || rpm -qa | grep -i dir-605l_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.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-2055 in dlink dir-605l_firmware?

Review vendor-specific security notices and update dlink dir-605l_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-2026-2055?

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-2026-2055?

CVE-2026-2055 is classified with a CVSS 3.1 Base Score of 5.3 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
5.3
MEDIUM SEVERITY
CVE ID CVE-2026-2055
Weakness CWE-200
Vendor dlink
Product dir-605l_firmware
Published 2026-02-06
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N