Affects Siemens SIMATIC WinCC, a widely deployed industrial SCADA/HMI; privilege escalation can lead to host compromise and operational disruption across many organizations.
CVE-2026-59241
Privilege escalation in Siemens SIMATIC WinCC allowing host command execution
Is CVE-2026-59241 being exploited?
Not confirmed. CVE-2026-59241 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.50% probability of exploitation in the next 30 days.
How severe is CVE-2026-59241?
CVE-2026-59241 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-59241?
Yes. A fix has been recorded for CVE-2026-59241. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-59241 affect?
CVE-2026-59241 affects SIMATIC WinCC V7.5 (all versions), SIMATIC WinCC V8.0 (< V8.0 Update 11), SIMATIC WinCC V8.1 (< V8.1 Update 7). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-59241?
Install V8.0 Update 11 / V8.1 Update 7 or later; restrict DB access and review host privileges
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
An authenticated user with DB access can escalate privileges and execute arbitrary commands on the WinCC host, risking full system/ICS compromise.
Immediate action required
- affected< *
- affected< V8.0 Update 11
- affected< V8.1 Update 7
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.