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CVE-2025-40943

CRITICALCVSS 9.6/10EPSS 0.46%

Last modified

CVE-2025-40943 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. Affected devices do not properly sanitize contents of trace files. This could allow an attacker to inject code through social engineering an authorized user, who has the function right "Read diagnostics", to import a specially crafted trace file. The malicious trace file is insufficiently sanitized and malicious code could be executed in the clients browser session and trigger PLC operations via the webserver that the legitimate user is authorized to perform.. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

Affected devices do not properly sanitize contents of trace files. This could allow an attacker to inject code through social engineering an authorized user, who has the function right "Read diagnostics", to import a specially crafted trace file. The malicious trace file is insufficiently sanitized and malicious code could be executed in the clients browser session and trigger PLC operations via the webserver that the legitimate user is authorized to perform.

Metrics

CVSS 3.1
9.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS 4.0
9.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.46%

36.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
SiemensSIMATIC Drive Controller CPU 1504D TF< V3.1.6
SiemensSIMATIC Drive Controller CPU 1507D TF< V3.1.6
SiemensSIMATIC ET 200SP CPU 1510SP F-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1510SP F-1 PN< V4.1.2
SiemensSIMATIC ET 200SP CPU 1510SP-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1510SP-1 PN< V4.1.2
SiemensSIMATIC ET 200SP CPU 1512SP F-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1512SP F-1 PN< V4.1.2
SiemensSIMATIC ET 200SP CPU 1512SP-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1512SP-1 PN< V4.1.2
SiemensSIMATIC ET 200SP CPU 1514SP F-2 PN< V4.1.2
SiemensSIMATIC ET 200SP CPU 1514SP-2 PN< V4.1.2
SiemensSIMATIC ET 200SP CPU 1514SPT F-2 PN< V4.1.2
SiemensSIMATIC ET 200SP CPU 1514SPT-2 PN< V4.1.2
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)< *
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs - Windows OS< *
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs - Industrial OS< *
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs - Windows OS< *
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs< *
SiemensSIMATIC S7-1500 CPU 1511-1 PN< *
SiemensSIMATIC S7-1500 CPU 1511-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1511C-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511C-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1511F-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511F-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1511T-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511T-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1511TF-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511TF-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1512C-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1512C-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1513-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1513-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1513F-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1513F-1 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1513pro F-2 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1513pro-2 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1515-2 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1515-2 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1515F-2 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1515F-2 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1515T-2 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1515T-2 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1515TF-2 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1515TF-2 PN< V4.1.2
SiemensSIMATIC S7-1500 CPU 1516-3 PN/DP< V2.9.9
SiemensSIMATIC S7-1500 CPU 1516-3 PN/DP< V4.1.2
SiemensSIMATIC S7-1500 CPU 1516F-3 PN/DP< V2.9.9
SiemensSIMATIC S7-1500 CPU 1516F-3 PN/DP< V4.1.2

Showing 50 of 122 affected configurations. See the CNA advisory for the full list.

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2025-40943?
Affected devices do not properly sanitize contents of trace files. This could allow an attacker to inject code through social engineering an authorized user, who has the function right "Read diagnostics", to import a specially crafted trace file. The malicious trace file is insufficiently sanitized and malicious code could be executed in the clients browser session and trigger PLC operations via the webserver that the legitimate user is authorized to perform.
How severe is CVE-2025-40943?
CVE-2025-40943 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.
How do I fix CVE-2025-40943?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST