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Critical severity9.8NVD Advisory· Published Jun 9, 2026· Updated Jun 9, 2026

CVE-2026-47291

CVE-2026-47291

Description

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

Affected products

1

Microsoft/Windows HTTP.sysllm-fuzzy

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

1

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

News mentions

3

Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
BleepingComputer · Jun 9, 2026
Microsoft June 2026 Patch Tuesday, (Tue, Jun 9th)
SANS Internet Storm Center · Jun 9, 2026
Microsoft Patch Tuesday June 2026 – 198 Vulnerabilities Fixed, Including 3 Zero-days
Cyber Security News · Jun 9, 2026