Is there a public exploit for CVE-2026-58114?

No public exploit for CVE-2026-58114 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-58114?

CVE-2026-58114 scores CVSS 7.7 (v4.0), rated high.

What does CVE-2026-58114 affect?

CVE-2026-58114 affects Siemens SIMATIC Process Historian 2022, SIMATIC WinCC V8.0, SIMATIC WinCC Runtime Professional V18, SIMATIC WinCC Runtime Professional V19, SIMATIC WinCC V8.1, SIMATIC WinCC Runtime Professional V21.

7.7 High

A vulnerability has been identified in SIMATIC BATCH V9.1 (All versions), SIMATIC Information Server 2020 (All versions), SIMATIC…

CVE-2026-58114

A vulnerability has been identified in SIMATIC BATCH V9.1 (All versions), SIMATIC Information Server 2020 (All versions), SIMATIC Information Server 2022 (All versions), SIMATIC PCS 7 V9.1 (All versions), SIMATIC Process Historian 2020 (All versions), SIMATIC Process Historian 2022 (All versions), SIMATIC WinCC Runtime Professional V17 (All versions), SIMATIC WinCC Runtime Professional V18 (All versions), SIMATIC WinCC Runtime Professional V19 (All versions), SIMATIC WinCC Runtime Professional V20 (All versions), SIMATIC WinCC Runtime Professional V21 (All versions), SIMATIC WinCC V7.5 (All versions), SIMATIC WinCC V8.0 (All versions), SIMATIC WinCC V8.1 (All versions). Affected systems do not properly secure their remote user authentication with the deprecated NTLM protocol. This could allow unauthenticated remote attackers, who have achieved a machine in the middle position, to relay NTLM authentication and impersonate a legitimate user. The potential impact depends on the services that are accessible, e.g. a SQL server used by WinCC.

Assessment

CVSS: 7.7 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 10 November 2026
Last updated: 10 November 2026
Affected: Siemens · SIMATIC BATCH V9.1 · SIMATIC Information Server 2020 · SIMATIC Information Server 2022 · SIMATIC PCS 7 V9.1
Assigner: siemens

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

https://cert-portal.siemens.com/productcert/html/ssa-970803.html

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