CVE-2022-47374 Denial of service in SIMATIC S7-400 CPU 412-2 PN V7

Q: Is CVE-2022-47374 being exploited?

There is no known exploitation of CVE-2022-47374 in the wild and no public exploit code.

Q: How do I fix CVE-2022-47374?

No fix has been published for CVE-2022-47374 yet. Limit exposure of the affected software until one is available.

High 7.5 Published 12 Dec 2023 Updated 25 Feb 2026

Attackers can exhaust system resources via HTTP requests, causing denial of service on Siemens SIMATIC and SINAMICS devices.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-47374?

CVE-2022-47374 is a high-severity denial of service vulnerability in Siemens SIMATIC S7-400 CPU 412-2 PN V7, published on 12 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been identified in SIMATIC PC-Station Plus (All versions), SIMATIC S7-400 CPU 412-2 PN V7 (All versions), SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions), SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions), SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions), SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions), SINAMICS S120 (incl. SIPLUS variants) (All versions < V5.2 SP3 HF15), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions). The affected products do not handle HTTP(S) requests to the web server correctly. This could allow an attacker to exhaust system resources and create a denial of service condition for the device.

Weakness: CWE-674

Which versions are affected by CVE-2022-47374?

It affects 9 products.

Products include Siemens 6ag1414-3em07-7ab0 Firmware, Siemens 6ag1416-3es07-7ab0 Firmware, Siemens 6es7412-2ek07-0ab0 Firmware, Siemens 6es7414-3em07-0ab0 Firmware, Siemens 6es7414-3fm07-0ab0 Firmware, Siemens 6es7416-3es07-0ab0 Firmware and 3 more.

How do I fix CVE-2022-47374?

No fix has been published for CVE-2022-47374 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-47374 being exploited?

There is no known exploitation of CVE-2022-47374 in the wild and no public exploit code.

CVE-2022-47375 Memory corruption in SIMATIC S7-400 CPU 412-2 PN V7 High 7.5

Sources

Also known as GHSA-cr2v-p345-fp24.