CVE-2026-47291
Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
CSIRTS triage
- What
- Integer overflow or wraparound allows an unauthorized attacker to execute code over a network.
- Who is affected
- All deployments of Windows HTTP.sys.
- Urgency
- Remediation is critical due to high severity and potential for remote code execution.
- Action
- Apply the latest security updates from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Elevated exploitation risk21.5% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 97% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalCVE-2026-47291: HTTP.sys Remote Code Execution Vulnerabilitymsrc · 2026-06-09
External references
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