CVE-2026-58114

Published Nov 10, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed

Description

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Siemens

SIMATIC BATCH V9.1

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC Information Server 2020

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC Information Server 2022

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC PCS 7 V9.1

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC Process Historian 2020

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC Process Historian 2022

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC Runtime Professional V17

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC Runtime Professional V18

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC Runtime Professional V19

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC Runtime Professional V20

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC Runtime Professional V21

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC V7.5

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC V8.0

unknown

Version	Status	Constraints
`0`	affected	< *

Siemens

SIMATIC WinCC V8.1

unknown

Version	Status	Constraints
`0`	affected	< *

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.345% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

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

History

Nov 12, 2026 1:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Nov 10, 2026 11:45 AM Description updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Weaknesses		CWE-1390
References		https://cert-portal.siemens.com/productcert/html/ssa-970803.html
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`