CVE detail
CVE-2026-40403
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 11.0 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
2 source links · newest first
- The May 2026 Security Update ReviewZero Day Initiative
take a closer look at some of the more interesting updates for this month, starting with a nasty-looking bug in DNS: - CVE-2026-41096 - Windows DNS Client Remote Code Execution Vulnerability This patch fixes a heap-based buffer overflow in the DNS Client triggered by a malicious DNS response. No authentication or user interaction needed, and since the
vendorwww.thezdi.comMay 12, 2026, 6:38 PM Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.
vendormsrc.microsoft.comMay 12, 2026, 2:00 PM
Exploit code
Public exploit repository references
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0 repository references · best confidence N/A · max 0 stars
Related records
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