VULNOS
All Threat Alerts
criticalCVE Alert
CVE-2020-15786

Critical Vulnerability: CVE-2020-15786 — siemens — simatic_hmi_basic_panels_2nd_generation_firmware, simatic_hmi_basic_panels_2nd_generation

A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force att

Tuesday, June 2, 2026siemensVulnios Threat Intelligence
Share:

Vulnerability Snapshot

CVE-2020-15786 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.

Affected technology: simatic_hmi_basic_panels_2nd_generation_firmware, simatic_hmi_basic_panels_2nd_generation, simatic_hmi_comfort_panels_firmware, simatic_hmi_comfort_panels, simatic_hmi_mobile_panels_firmware, plus 3 other product variants.

Executive Summary

A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.

Why It Matters

CVE-2020-15786 is rated CRITICAL severity, requiring immediate attention from security teams.

CVSS Base Score: 9.8/10

Affected Technologies

Vendors: siemens

Products: simatic_hmi_basic_panels_2nd_generation_firmware, simatic_hmi_basic_panels_2nd_generation, simatic_hmi_comfort_panels_firmware, simatic_hmi_comfort_panels, simatic_hmi_mobile_panels_firmware, simatic_hmi_mobile_panels, simatic_hmi_united_comfort_panels_firmware, simatic_hmi_united_comfort_panels

🛡️What Defenders Should Check

  • Check if you are affected — Review your asset inventory for products listed in CVE-2020-15786.
  • Apply available patches — Visit vendor advisories for the latest security updates.
  • Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

    • Use Vulnios to continuously monitor your exposure to CVE-2020-15786 and similar vulnerabilities.

    References & Sources

  • https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdf
  • https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdf

    • How Vulnios Detects This

    Vulnios scans for this vulnerability using Trivy and Grype for SBOM-based CVE matching and Vulnios CVE feed continuous monitoring against your asset inventory. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.

    AI Security Advisor

    Powered by Gemini

    Get AI-powered security recommendations tailored to this specific threat — including risk assessment, detection guidance, MITRE ATT&CK mapping, and actionable remediation steps.

    Affected Products

    simatic_hmi_basic_panels_2nd_generation_firmwaresimatic_hmi_basic_panels_2nd_generationsimatic_hmi_comfort_panels_firmwaresimatic_hmi_comfort_panelssimatic_hmi_mobile_panels_firmwaresimatic_hmi_mobile_panelssimatic_hmi_united_comfort_panels_firmwaresimatic_hmi_united_comfort_panels

    Sources

    Related Threat Alerts

    Frequently Asked Questions

    What is CVE-2020-15786?

    CVE-2020-15786 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), S

    Am I affected?

    Check whether your environment runs simatic_hmi_basic_panels_2nd_generation_firmware, simatic_hmi_basic_panels_2nd_generation, simatic_hmi_comfort_panels_firmware, simatic_hmi_comfort_panels, simatic_hmi_mobile_panels_firmware. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.

    How urgent is the response?

    Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.

    How do I remediate?

    Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.

    Where can I track exploitation activity?

    Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2020-15786. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.

    How does Vulnios help with this?

    Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.

    critical

    Protect Your Organization

    Monitor CVEs, scan for vulnerabilities, and get real-time threat alerts — all in one platform.

    Get Started FreeFree Security ScanOSINT Dashboard

    Get instant alerts on Telegram

    Join our public channel for real-time critical CVE alerts.

    Follow @vulnios