Vulnerability in SIMATIC HMI Basic Panels (CVE-2020-15786)
Summary
Vulnerability in SIMATIC HMI Basic Panels (CVE-2020-15786). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions >= 14 and V < XX), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions), SIMATIC HMI Mobile Panels (All versions), SIMATIC HMI United Comfort Panels (All versions). 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.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2020-15786 has been found in SIMATIC HMI Basic Panels.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "SIMATIC HMI Basic Panels CVE-2020-15786" on the vendor's site.
CVE-2020-15786 (SIMATIC HMI Basic Panels) — CWE-307 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-307) exists in SIMATIC HMI Basic Panels.
Check the vendor advisory for the affected versions of SIMATIC HMI Basic Panels.
Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで SIMATIC HMI Basic Panels を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web cert-portal.siemens.com
- web nvd.nist.gov
- web github.com