# Siemens SIMATIC CN 4100 vulnerabilities Source: https://junglewise.ai/threats/technologies/simatic-cn-4100 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.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 79 vulnerabilities in Siemens SIMATIC CN 4100: 0 in the last 7 days and 0 in the last 90 days, 11 of them critical and 2 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: 79 (11 critical, 2 exploited in the wild) ## About Siemens SIMATIC CN 4100 Firmware for Siemens SIMATIC CN 4100 industrial control system. ## Latest Siemens SIMATIC CN 4100 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-2026-31431: Linux Kernel crypto algif_aead improper memory handling](https://junglewise.ai/threats/cve-2026-31431-linux-kernel-crypto-algif-aead-improper-memory-handling) (critical, exploited in the wild, CVSS 7.8, published 22 Apr 2026) - [CVE-2026-31790: OpenSSL uninitialized memory disclosure in RSASVE key encapsulation](https://junglewise.ai/threats/cve-2026-31790-openssl-uninitialized-memory-disclosure-in-rsasve-key) (high, CVSS 7.5, published 7 Apr 2026) - [CVE-2026-31789: OpenSSL heap buffer overflow in buf2hex conversion](https://junglewise.ai/threats/cve-2026-31789-openssl-heap-buffer-overflow-in-buf2hex-conversion) (critical, CVSS 9.8, published 7 Apr 2026) - [CVE-2026-28390: OpenSSL NULL pointer dereference in CMS EnvelopedData processing](https://junglewise.ai/threats/cve-2026-28390-openssl-null-pointer-dereference-in-cms-envelopeddata-processing) (high, CVSS 7.5, published 7 Apr 2026) - [CVE-2026-28389: OpenSSL NULL pointer dereference in CMS EnvelopedData processing](https://junglewise.ai/threats/cve-2026-28389-openssl-null-pointer-dereference-in-cms-envelopeddata-processing) (high, CVSS 7.5, published 7 Apr 2026) - [CVE-2026-28388: OpenSSL NULL pointer dereference in delta CRL processing](https://junglewise.ai/threats/cve-2026-28388-openssl-null-pointer-dereference-in-delta-crl-processing) (high, CVSS 7.5, published 7 Apr 2026) - [CVE-2026-28387: OpenSSL use-after-free in DANE TLSA-based authentication](https://junglewise.ai/threats/cve-2026-28387-openssl-use-after-free-in-dane-tlsa-based-authentication) (high, CVSS 8.1, published 7 Apr 2026) - [CVE-2026-21947: Oracle Java SE XSS in JavaFX](https://junglewise.ai/threats/cve-2026-21947-oracle-java-se-xss-in-javafx) (low, CVSS 3.1, published 20 Jan 2026) - [CVE-2026-21945: Oracle Java SE and GraalVM denial of service in Security component](https://junglewise.ai/threats/cve-2026-21945-oracle-java-se-and-graalvm-denial-of-service-in-security) (high, CVSS 7.5, published 20 Jan 2026) - [CVE-2026-21933: Oracle Java SE and GraalVM networking data manipulation](https://junglewise.ai/threats/cve-2026-21933-oracle-java-se-and-graalvm-networking-data-manipulation) (medium, CVSS 6.1, published 20 Jan 2026) - [CVE-2026-21932: Oracle Java SE improper URI handling in AWT and JavaFX](https://junglewise.ai/threats/cve-2026-21932-oracle-java-se-improper-uri-handling-in-awt-and-javafx) (high, CVSS 7.4, published 20 Jan 2026) - [CVE-2026-21925: Oracle Java SE and GraalVM data manipulation in RMI](https://junglewise.ai/threats/cve-2026-21925-oracle-java-se-and-graalvm-data-manipulation-in-rmi) (medium, CVSS 4.8, published 20 Jan 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) - [CVE-2025-61795: Apache Tomcat DoS via delayed cleanup of multipart temporary files](https://junglewise.ai/threats/cve-2025-61795-apache-tomcat-dos-via-delayed-cleanup-of-multipart-temporary) (medium, CVSS 5.3, published 27 Oct 2025) - [CVE-2025-55752: Apache Tomcat relative path traversal in URL rewrite normalization](https://junglewise.ai/threats/cve-2025-55752-apache-tomcat-relative-path-traversal-in-url-rewrite) (high, CVSS 7.5, published 27 Oct 2025) - [CVE-2025-61748: Oracle Java SE and GraalVM improper access control in Libraries](https://junglewise.ai/threats/cve-2025-61748-oracle-java-se-and-graalvm-improper-access-control-in-libraries) (low, CVSS 3.7, published 21 Oct 2025) - [CVE-2025-39866: Linux Kernel use-after-free in __mark_inode_dirty](https://junglewise.ai/threats/cve-2025-39866-linux-kernel-use-after-free-in-mark-inode-dirty) (high, CVSS 7.8, published 19 Sep 2025) - [CVE-2025-39857: Linux Kernel NULL pointer dereference in net/smc](https://junglewise.ai/threats/cve-2025-39857-linux-kernel-null-pointer-dereference-in-net-smc) (high, CVSS 7.5, published 19 Sep 2025) - [CVE-2025-39849: Linux Kernel out-of-bounds write in cfg80211 SME SSID handling](https://junglewise.ai/threats/cve-2025-39849-linux-kernel-out-of-bounds-write-in-cfg80211-sme-ssid-handling) (high, CVSS 8.8, published 19 Sep 2025) ## Most severe Siemens SIMATIC CN 4100 vulnerabilities - [CVE-2025-39682: Linux Kernel memory corruption in TLS zero-length record handling](https://junglewise.ai/threats/cve-2025-39682-linux-kernel-memory-corruption-in-tls-zero-length-record-handling) (critical, exploited in the wild, CVSS 9.8, published 5 Sep 2025) - [CVE-2026-31431: Linux Kernel crypto algif_aead improper memory handling](https://junglewise.ai/threats/cve-2026-31431-linux-kernel-crypto-algif-aead-improper-memory-handling) (critical, exploited in the wild, CVSS 7.8, published 22 Apr 2026) - [CVE-2026-31789: OpenSSL heap buffer overflow in buf2hex conversion](https://junglewise.ai/threats/cve-2026-31789-openssl-heap-buffer-overflow-in-buf2hex-conversion) (critical, CVSS 9.8, published 7 Apr 2026) - [CVE-2025-38724: Linux Kernel nfsd use-after-free in nfsd4_setclientid_confirm](https://junglewise.ai/threats/cve-2025-38724-linux-kernel-nfsd-use-after-free-in-nfsd4-setclientid-confirm) (critical, CVSS 9.8, published 4 Sep 2025) - [CVE-2025-38708: Linux Kernel use after free in DRBD handle_write_conflicts](https://junglewise.ai/threats/cve-2025-38708-linux-kernel-use-after-free-in-drbd-handle-write-conflicts) (critical, CVSS 9.8, published 4 Sep 2025) - [CVE-2025-39703: Linux kernel denial of service in HSR frame processing](https://junglewise.ai/threats/cve-2025-39703-linux-kernel-denial-of-service-in-hsr-frame-processing) (critical, CVSS 9.8, published 5 Sep 2025) - [CVE-2025-39702: Linux Kernel timing attack in IPv6 Segment Routing HMAC validation](https://junglewise.ai/threats/cve-2025-39702-linux-kernel-timing-attack-in-ipv6-segment-routing-hmac) (critical, CVSS 9.8, published 5 Sep 2025) - [CVE-2025-39673: Linux Kernel race condition in ppp_fill_forward_path](https://junglewise.ai/threats/cve-2025-39673-linux-kernel-race-condition-in-ppp-fill-forward-path) (critical, CVSS 9.8, published 5 Sep 2025) - [CVE-2025-38552: Linux Kernel race condition in MPTCP subflow creation](https://junglewise.ai/threats/cve-2025-38552-linux-kernel-race-condition-in-mptcp-subflow-creation) (critical, CVSS 9.4, published 16 Aug 2025) - [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) ## 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 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 - [Siemens SIMATIC Drive Controller CPU 1507D TF](https://junglewise.ai/threats/technologies/simatic-drive-controller-cpu-1507d-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 vulnerabilities", https://junglewise.ai/threats/technologies/simatic-cn-4100, 11 November 2026.