LOW CVSS 3.5
Published: 2025-12-30

CVE-2025-15245

dlink dcs-850l_firmware Security Advisory (CVE-2025-15245)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-15245 impacting dlink dcs-850l_firmware. Evaluated with CVSS Base Score of 3.5 (LOW).

Original NVD Description

Source: NIST NVD
A vulnerability was found in D-Link DCS-850L 1.02.09. Affected is the function uploadfirmware of the component Firmware Update Service. The manipulation of the argument DownloadFile results in path traversal. The attack must originate from the local network. The exploit has been made public and could be used. This vulnerability only affects products that are no longer supported by the maintainer.

📊 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
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
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 / dcs-850l_firmware
Affected Versions 1.02.09
Weakness Enumeration CWE-22

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-2025-15245 impacting dlink dcs-850l_firmware.

⚡ Nuclei Detection Template (YAML) cve-2025-15245.yaml
id: cve-2025-15245

info:
  name: dlink dcs-850l_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: low
  description: |
    Automated signature & scanner for CVE-2025-15245 affecting dlink dcs-850l_firmware.
    Evaluation: A vulnerability was found in D-Link DCS-850L 1.02.09. Affected is the function uploadfirmware of the component Firmware Update Service. The manipulati...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-15245
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 3.5
    cve-id: CVE-2025-15245
    cwe-id: CWE-22
  tags: cve,cve-2025-15245,dlink,dcs-850l_firmware,low

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "dcs-850l_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-15245.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-15245
# Target: dlink dcs-850l_firmware | CVSS: 3.5 (LOW)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-15245 (dlink dcs-850l_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 dcs-850l_firmware scope (1.02.09).")
        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-2025-15245.sh
# Recommended Remediation & Patching Commands for CVE-2025-15245
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install dcs-850l_firmware 2>/dev/null || \
sudo dnf upgrade dcs-850l_firmware 2>/dev/null || \
sudo yum update dcs-850l_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i dcs-850l_firmware 2>/dev/null || rpm -qa | grep -i dcs-850l_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-2025-15245 in dlink dcs-850l_firmware?

Review vendor-specific security notices and update dlink dcs-850l_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-2025-15245?

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-2025-15245?

CVE-2025-15245 is classified with a CVSS 3.1 Base Score of 3.5 (LOW). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
3.5
LOW SEVERITY
CVE ID CVE-2025-15245
Weakness CWE-22
Vendor dlink
Product dcs-850l_firmware
Published 2025-12-30
Vector CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N