CVE-2026-65791 is a critical remote code execution vulnerability in Windows iSCSI Target Service caused by a heap-based buffer overflow. The flaw can be triggered over the network by sending a specially crafted packet to an affected iSCSI Target Service instance. The vulnerability requires no authentication and no user interaction, and Microsoft’s published scoring indicates low attack complexity with network reachability. Affected platforms include multiple supported Windows Server releases and certain Windows client builds where the vulnerable service is present.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Critical-severity remote code execution vulnerability in Windows iSCSI Target Service. The content says it requires neither authentication nor user interaction.
A critical remote code execution vulnerability in Windows iSCSI Target Service identified as a priority for servers with the iSCSI Target role enabled.
A Windows iSCSI Target Service remote code execution vulnerability mentioned only in a list of other notable CVEs.
A critical heap-based buffer overflow remote code execution vulnerability in Windows iSCSI Target Service.
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.