Code Injection via Unsanitized Trace File Import in Siemens SIMATIC Devices
CVE-2025-40943 affects multiple Siemens SIMATIC products, including SIMATIC Drive Controller CPU 1504D TF and 1507D TF, multiple SIMATIC ET 200SP CPU variants, SIMATIC ET 200SP Open Controller CPU 1515SP PC/PC2/PC3 variants, and SIMATIC S7-1500 devices. The vulnerability is caused by improper sanitization of the contents of trace files during import. A remote attacker can craft a malicious trace file containing injected code and, through social engineering, induce a legitimate user to import that file into an affected device or engineering environment. Successful exploitation results in code injection in the context of the trace file handling functionality.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.