HIGH CVSS 7.8
Published: 2021-04-22

CVE-2021-25678

siemens solid_edge_se2020 Security Advisory (CVE-2021-25678)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2021-25678 impacting siemens solid_edge_se2020. Evaluated with CVSS Base Score of 7.8 (HIGH).

Original NVD Description

Source: NIST NVD
A vulnerability has been identified in Solid Edge SE2020 (All versions < SE2020MP13), Solid Edge SE2020 (All versions < SE2020MP14), Solid Edge SE2021 (All Versions < SE2021MP4). Affected applications lack proper validation of user-supplied data when parsing PAR files. This could result in an out of bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-12529)

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Local (AV:L)
Requires local system execution permissions
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
Required (UI:R)
User must click or open resource
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 siemens / solid_edge_se2020
Affected Versions *
Weakness Enumeration CWE-787

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-2021-25678 impacting siemens solid_edge_se2020.

⚡ Nuclei Detection Template (YAML) cve-2021-25678.yaml
id: cve-2021-25678

info:
  name: siemens solid_edge_se2020 - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2021-25678 affecting siemens solid_edge_se2020.
    Evaluation: A vulnerability has been identified in Solid Edge SE2020 (All versions &lt; SE2020MP13), Solid Edge SE2020 (All versions &lt; SE2020MP14), Solid Edge ...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2021-25678
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    cvss-score: 7.8
    cve-id: CVE-2021-25678
    cwe-id: CWE-787
  tags: cve,cve-2021-25678,siemens,solid_edge_se2020,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "solid_edge_se2020"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2021-25678.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2021-25678
# Target: siemens solid_edge_se2020 | CVSS: 7.8 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2021-25678 (siemens solid_edge_se2020)...")
    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 siemens solid_edge_se2020 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-2021-25678.sh
# Recommended Remediation & Patching Commands for CVE-2021-25678
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install solid_edge_se2020 2>/dev/null || \
sudo dnf upgrade solid_edge_se2020 2>/dev/null || \
sudo yum update solid_edge_se2020

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i solid_edge_se2020 2>/dev/null || rpm -qa | grep -i solid_edge_se2020

# 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-2021-25678 in siemens solid_edge_se2020?

Review vendor-specific security notices and update siemens solid_edge_se2020 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-2021-25678?

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-2021-25678?

CVE-2021-25678 is classified with a CVSS 3.1 Base Score of 7.8 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.8
HIGH SEVERITY
CVE ID CVE-2021-25678
Weakness CWE-787
Vendor siemens
Product solid_edge_se2020
Published 2021-04-22
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H