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CVE-2026-8805 is an integer overflow or wraparound vulnerability in the EtherNet/IP function of the Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module. It affects FX5-EIP version 1.000 and earlier. The flaw can be triggered remotely by rapidly establishing a large number of TCP connections to the device, which causes an inconsistency in the module's internal connection management process and leads to improper memory access. The documented consequence is a denial-of-service condition in the affected product.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
3 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.
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.