CVE-2026-59082: Siemens SIMATIC WinCC implicit active content execution vulnerability

CVE-2026-59082 · Severity: high · CVSS 7.8 · Published 2026-11-10

SIMATIC WinCC is a supervisory control and data acquisition (SCADA) system used to monitor and control industrial processes. When a user opens a specially crafted file, the application automatically executes embedded active content, allowing an attacker to run arbitrary code on the system. This could lead to full control of critical industrial infrastructure and operational technology systems.

Technologies: Siemens SIMATIC WinCC. Vendors: Siemens.

Quick answers

Is CVE-2026-59082 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-59082 being exploited in the wild.
How severe is CVE-2026-59082?
High severity, with a CVSS score of 7.8, published 10 November 2026.
Which products and versions are affected?
Siemens SIMATIC WinCC V7.5 (all versions), V8.0 (all versions), V8.1 (all versions).
Is there a fix for CVE-2026-59082?
No fixed version is recorded yet. Operate the affected product only with qualified personnel trained to identify risks and avoid hazards. Only open files from trusted sources and ensure appropriate network access controls are configured according to Siemens operational guidelines for Industrial Security. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-59082 attacked?
It is attacked with local access.
Am I affected by CVE-2026-59082?
Check whether you run Siemens SIMATIC WinCC at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Operate the affected product only with qualified personnel trained to identify risks and avoid hazards. Only open files from trusted sources and ensure appropriate network access controls are configured according to Siemens operational guidelines for Industrial Security.

Technical details

SIMATIC WinCC Graphics Designer implicitly executes active content upon opening files without adequate user warnings (CWE-357), allowing arbitrary code execution via a malicious file. The vulnerability affects versions before V8.2 and requires local access and user interaction to open an untrusted file. An attacker can gain complete control over the affected device with the privileges of the user opening the file.

Affected products

  • Siemens SIMATIC WinCC V7.5 (all versions), V8.0 (all versions), V8.1 (all versions)

Timeline

  • 2026-11-10: disclosed

References

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