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CVE-2025-49666 is a heap-based buffer overflow affecting the Windows Kernel in the context of the Windows Setup and Boot Event Collection (SBEC) service. The vulnerability is caused by improper memory handling and insufficient validation of buffer boundaries while processing incoming network event data for SBEC. An authenticated attacker can send specially crafted oversized network packets to the exposed SBEC service and trigger heap memory corruption. Successful exploitation can corrupt adjacent memory structures and may enable overwriting of critical kernel pointers, resulting in arbitrary code execution in a highly privileged context.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
1 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.