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CVE-2025-40943 is an improper input neutralization vulnerability in Siemens SIMATIC industrial automation devices that affects the handling of diagnostic trace files. The affected devices do not properly sanitize the contents of imported trace files. An attacker can craft a malicious trace file and, through social engineering, induce an authorized user with the "Read diagnostics" function right to import it. When the trace file is processed, attacker-controlled script content can execute in the user’s browser session within the device web interface. Because the script runs in the context of the legitimate user’s authenticated session, it can invoke PLC-related operations exposed by the web server with that user’s existing privileges.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.