CVE•Published 2026-05-12•Modified 2026-05-15•1 article on news•6 live references•NVD data
CVE-2026-40403Microsoft · Windows_10_1607
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.
Timeline
Published 2026-05-12
Modified 2026-05-15
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-40403Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Windows 10 1607"Hosts Shodan identified as running Windows 10 1607.
More intel sources (5)
Shodan report
vuln:CVE-2026-40403Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-40403Censys host search filtered to this CVE id.
grep.app
CVE-2026-40403Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-40403GitHub code search for direct mentions.
Google dork
"CVE-2026-40403" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.