Detections
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CVE-2026-47291

critical

Description

Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47291

https://thehackernews.com/2026/06/microsoft-patches-record-206-flaws.html

https://www.theregister.com/patches/2026/06/09/ai-is-making-patch-tuesday-kinda-fun-again/5253225

https://securityaffairs.com/193417/security/microsoft-releases-record-breaking-patch-tuesday-with-208-cves.html

Details

Source: Mitre, NVD

Published: 2026-06-09

Updated: 2026-06-10

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.21506