Simatic Cn 4100 Firmware vulnerabilitiesAnd the versions its exploited flaws hit.
Simatic Cn 4100 Firmware is made by Siemens. We track 3 published vulnerabilities in it, across 3 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 18 September 2026. If you run Simatic Cn 4100 Firmware, check your version against the exploited flaws below and patch those first.
The most recent Simatic Cn 4100 Firmware flaw added to the known-exploited list is CVE-2025-39682, on 18 September 2026. We keep watching the known-exploited list.
Which versions of Simatic Cn 4100 Firmware do the exploited flaws hit?
Each exploited flaw lists the versions it affects, usually as ranges. "before 5.0" means every version up to, but not including, 5.0. Find your version, then patch.
- CVE-2025-39682Exploited list, 18 Sep 2026
Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
before 5.0
Which Simatic Cn 4100 Firmware vulnerabilities are being exploited?
1 flaw is on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 9.8Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
Linux Kernel contains an improper check for unusual or exceptional conditions vulnerability in the TLS receive path which allows a zero-length record retrieved from the rx_list to bypass the intended recvmsg()...
Which Simatic Cn 4100 Firmware flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 2.9%
In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must process either - only contiguous DATA records (any number of them)...
- 0.7%CVE-2024-32740Critical
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0).
- 0.6%CVE-2024-32741Critical
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0).
- 0.4%CVE-2024-32742High
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0).
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1 flaw being exploited affects software Acme tracks
Linux Kernel contains an improper check for unusual or exceptional conditions vulnerability in the TLS receive path which allows a zero-length record retrieved from the rx_list to bypass the intended recvmsg() record-type handling, potentially causing subsequent TLS records to be processed using incorrect zero-copy and queuing assumptions. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.
- Matched to
- Simatic Cn 4100 Firmware on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 3 published vulnerabilities listed under the name Simatic Cn 4100 Firmware, across 3 versions. The most recent Simatic Cn 4100 Firmware flaw added to the known-exploited list is CVE-2025-39682, on 18 September 2026.
1 is on the list of flaws known to be exploited. The most recently added is CVE-2025-39682.
Each flaw names its own versions, usually as ranges. The newest, CVE-2025-39682, affects before 5.0. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Simatic Cn 4100 Firmware. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.