CVE-2026-58114Siemens SIMATIC BATCH V9.1 < *
NVD
Vulnerability Summary
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.
CVSS v4.0 Base Metrics — Score 7.7 (HIGH)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NAttack VectorNetwork
Attack ComplexityLow
Attack RequirementsPresent
Privileges RequiredNone
User InteractionPassive
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Show CVSS v3.x metrics (score 7.5)
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HAttack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Affected & Patched Versions
- Siemens SIMATIC BATCH V9.1 < *
- Siemens SIMATIC Information Server 2020 < *
- Siemens SIMATIC Information Server 2022 < *
- Siemens SIMATIC PCS 7 V9.1 < *
- Siemens SIMATIC Process Historian 2020 < *
- Siemens SIMATIC Process Historian 2022 < *
- Siemens SIMATIC WinCC Runtime Professional V17 < *
- Siemens SIMATIC WinCC Runtime Professional V18 < *
- Siemens SIMATIC WinCC Runtime Professional V19 < *
- Siemens SIMATIC WinCC Runtime Professional V20 < *
- Siemens SIMATIC WinCC Runtime Professional V21 < *
- Siemens SIMATIC WinCC V7.5 < *
- Siemens SIMATIC WinCC V8.0 < *
- Siemens SIMATIC WinCC V8.1 < *
- Siemens SIMATIC BATCH V9.1 *
- Siemens SIMATIC Information Server 2020 *
- Siemens SIMATIC Information Server 2022 *
- Siemens SIMATIC PCS 7 V9.1 *
- Siemens SIMATIC Process Historian 2020 *
- Siemens SIMATIC Process Historian 2022 *
- Siemens SIMATIC WinCC Runtime Professional V17 *
- Siemens SIMATIC WinCC Runtime Professional V18 *
- Siemens SIMATIC WinCC Runtime Professional V19 *
- Siemens SIMATIC WinCC Runtime Professional V20 *
- Siemens SIMATIC WinCC Runtime Professional V21 *
- Siemens SIMATIC WinCC V7.5 *
- Siemens SIMATIC WinCC V8.0 *
- Siemens SIMATIC WinCC V8.1 *
What to do
Plan remediation soon. No exploitation is confirmed yet, but the severity is high.
- Check whether you run Siemens SIMATIC BATCH V9.1 < * and which version.
- Update to a patched version listed above, then confirm the new version.
Timeline
- Nov 10, 2026Published
- Nov 10, 2026Record last modified
Score, severity and exploitation changes are tracked from the day Watchtower started logging them.
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Data last checked: Nov 14, 2026 01:09 UTC