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CVE-2025-40800 is an improper certificate validation flaw in the IAM client used by multiple Siemens products. When establishing TLS connections to the authorization server, the IAM client fails to validate the server certificate, enabling an attacker positioned on the network path to impersonate the authorization server and conduct man-in-the-middle interception/modification of the TLS-protected session. Affected products include COMOS V10.6 (all versions), NX V2412 (< V2412.8700), NX V2506 (< V2506.6000), Simcenter 3D (< V2506.6000), Simcenter Femap (< V2506.0002), Solid Edge SE2025 (< V225.0 Update 10), and Solid Edge SE2026 (< V226.0 Update 1).
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No public exploit code observed for this vulnerability.
9 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.