Siemens WinCC: 1 CVE, High 8.8

Summary

CISA reports 1 vulnerability in Siemens SIMATIC WinCC V7.5, SIMATIC WinCC V8.0, SIMATIC WinCC V8.1. Weakness type: Incorrect Privilege Assignment. Multiple SIMATIC WinCC versions are affected by a database privilege escalation vulnerability that could allow an authenticated user with access to the database to execute commands on the underlying host system. Highest CVSS v3 score: 8.8 (High), exploitable over the network.

At a glance

Vendor

Siemens

Products

SIMATIC WinCC V7.5, SIMATIC WinCC V8.0, SIMATIC WinCC V8.1

CVEs

CVE-2026-59241

Highest CVSS v3

8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Highest CVSS v4

–

Known exploited (KEV)

No CVE from this advisory is on the KEV list as of the last refresh

Sectors (per CISA)

Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities

Deployed

Worldwide

Vendor HQ

Germany

Vulnerabilities

Affected products (3)

• SIMATIC WinCC V7.5
• SIMATIC WinCC V8.0 < V8.0 Update 11
• SIMATIC WinCC V8.1 < V8.1 Update 7

Vendor fixes and mitigations (from advisory)

• None Available: Currently no fix is available
• Vendor Fix: Update to V8.0 Update 11 or later version link
• Vendor Fix: Update to V8.1 Update 7 or later version link

Also apply CISA's standard ICS practices: minimize network exposure, keep control networks behind firewalls and isolated from business networks, and use up-to-date secure remote access.

Sources

• CISA advisory ICSA-26-295-13
• Machine-readable CSAF record
• https://cert-portal.siemens.com/productcert/csaf/ssa-550198.json
• https://cert-portal.siemens.com/productcert/html/ssa-550198.html

This page is generated automatically from the CISA advisory text. It is not a substitute for the vendor's guidance; verify affected versions and fixes at the source before making changes to control systems.