DoS in Siemens SIMATIC/SIPLUS ET 200 interface modules via S7 Disconnect Request (TCP/102)
Multiple Siemens SIMATIC and SIPLUS ET 200-series interface modules and PN couplers do not properly handle S7 protocol session disconnect requests. When an attacker sends a valid S7 protocol Disconnect Request (COTP DR TPDU) to the device on TCP port 102, the device can enter an improper session state. This improper state can render the device unresponsive, and normal operation is only restored after a power cycle.
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Impact
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Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
9 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.