PatchTheCVEsimatic cn 4100 firmware vulnerabilities and fixes
Recent CVEs affecting simatic cn 4100 firmware, with upgrade or downgrade steps. 6 tracked.
simatic cn 4100 firmware has 6 tracked vulnerabilities, 1 critical and 1 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 6. Most recent: 2025-12-09. Highest priority: CVE-2025-39682 (score 99/100).
- CVE-2025-40937 HIGH 8.3 UPGRADE A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1)
- CVE-2025-40938 HIGH 8.1 UPGRADE A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1)
- CVE-2025-40940 MEDIUM 4.9 UPGRADE A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1)
- CVE-2025-40941 MEDIUM 4.3 UPGRADE A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1)
- CVE-2025-40939 MEDIUM 4.6 UPGRADE A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1)
- CVE-2025-39682 CRITICAL 9.8 EXPLOITED UPGRADE MITIGATE Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
FAQ
How do I fix simatic cn 4100 firmware vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is simatic cn 4100 firmware being exploited right now?
Yes: 1 simatic cn 4100 firmware CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.
Which simatic cn 4100 firmware CVE should I patch first?
CVE-2025-39682 currently ranks highest (99/100): Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability.