# Siemens Simatic Cn 4100 Firmware vulnerabilities Source: https://junglewise.ai/threats/technologies/simatic-cn-4100-firmware Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/simatic-cn-4100-firmware.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 7 vulnerabilities in Siemens Simatic Cn 4100 Firmware: 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-22925, was published on 12 May 2026. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 7 (1 critical, 0 exploited in the wild) ## About Siemens Simatic Cn 4100 Firmware Firmware for the SIMATIC CN 4100 communication processor used in industrial automation. ## Latest Siemens Simatic Cn 4100 Firmware vulnerabilities - [CVE-2026-22925: Siemens SIMATIC CN 4100 resource exhaustion via TCP SYN flood](https://junglewise.ai/threats/cve-2026-22925-siemens-simatic-cn-4100-resource-exhaustion-via-tcp-syn-flood) (high, CVSS 7.5, published 12 May 2026) - [CVE-2026-22924: Siemens SIMATIC CN 4100 missing authentication and resource exhaustion](https://junglewise.ai/threats/cve-2026-22924-siemens-simatic-cn-4100-missing-authentication-and-resource) (critical, CVSS 9.1, published 12 May 2026) - [CVE-2025-40941: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected devices exposes server…](https://junglewise.ai/threats/cve-2025-40941-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (medium, CVSS 4.3, published 9 Dec 2025) - [CVE-2025-40940: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application exhibits…](https://junglewise.ai/threats/cve-2025-40940-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (medium, CVSS 4.9, published 9 Dec 2025) - [CVE-2025-40939: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device contains a USB…](https://junglewise.ai/threats/cve-2025-40939-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (medium, CVSS 4.6, published 9 Dec 2025) - [CVE-2025-40938: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive…](https://junglewise.ai/threats/cve-2025-40938-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (high, CVSS 8.1, published 9 Dec 2025) - [CVE-2025-40937: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application do not…](https://junglewise.ai/threats/cve-2025-40937-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (high, CVSS 8.3, published 9 Dec 2025) ## Most severe Siemens Simatic Cn 4100 Firmware vulnerabilities - [CVE-2026-22924: Siemens SIMATIC CN 4100 missing authentication and resource exhaustion](https://junglewise.ai/threats/cve-2026-22924-siemens-simatic-cn-4100-missing-authentication-and-resource) (critical, CVSS 9.1, published 12 May 2026) - [CVE-2025-40937: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application do not…](https://junglewise.ai/threats/cve-2025-40937-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (high, CVSS 8.3, published 9 Dec 2025) - [CVE-2025-40938: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive…](https://junglewise.ai/threats/cve-2025-40938-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (high, CVSS 8.1, published 9 Dec 2025) - [CVE-2026-22925: Siemens SIMATIC CN 4100 resource exhaustion via TCP SYN flood](https://junglewise.ai/threats/cve-2026-22925-siemens-simatic-cn-4100-resource-exhaustion-via-tcp-syn-flood) (high, CVSS 7.5, published 12 May 2026) - [CVE-2025-40940: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application exhibits…](https://junglewise.ai/threats/cve-2025-40940-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (medium, CVSS 4.9, published 9 Dec 2025) - [CVE-2025-40939: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device contains a USB…](https://junglewise.ai/threats/cve-2025-40939-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (medium, CVSS 4.6, published 9 Dec 2025) - [CVE-2025-40941: A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected devices exposes server…](https://junglewise.ai/threats/cve-2025-40941-a-vulnerability-has-been-identified-in-simatic-cn-4100-all) (medium, CVSS 4.3, published 9 Dec 2025) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Siemens technologies - [Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP](https://junglewise.ai/threats/technologies/simatic-s7-1500-cpu-1518-4-pn-dp-mfp): 204 vulnerabilities - [Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP](https://junglewise.ai/threats/technologies/simatic-s7-1500-cpu-1518f-4-pn-dp-mfp): 83 vulnerabilities - [Siemens SIMATIC CN 4100](https://junglewise.ai/threats/technologies/simatic-cn-4100): 79 vulnerabilities - [Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP](https://junglewise.ai/threats/technologies/siplus-s7-1500-cpu-1518-4-pn-dp-mfp): 70 vulnerabilities - [Siemens RUGGEDCOM APE1808](https://junglewise.ai/threats/technologies/ruggedcom-ape1808): 28 vulnerabilities - [Siemens Ruggedcom Rox II](https://junglewise.ai/threats/technologies/ruggedcom-rox-ii): 16 vulnerabilities - [Siemens RUGGEDCOM RST2428P](https://junglewise.ai/threats/technologies/ruggedcom-rst2428p): 16 vulnerabilities - [Siemens ROX II](https://junglewise.ai/threats/technologies/rox-ii): 14 vulnerabilities - [Siemens RUGGEDCOM CROSSBOW](https://junglewise.ai/threats/technologies/ruggedcom-crossbow): 13 vulnerabilities - [Siemens SINEC OS](https://junglewise.ai/threats/technologies/sinec-os): 12 vulnerabilities - [Siemens Solid Edge](https://junglewise.ai/threats/technologies/solid-edge): 12 vulnerabilities - [Siemens SIMATIC Drive Controller CPU 1504D TF](https://junglewise.ai/threats/technologies/simatic-drive-controller-cpu-1504d-tf): 11 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Siemens Simatic Cn 4100 Firmware vulnerabilities", https://junglewise.ai/threats/technologies/simatic-cn-4100-firmware, 11 November 2026.