Denial of Service Vulnerability in Windows Internet Information Services by Microsoft
CVE-2026-97830

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 23h2
Windows 11 Version 23h2
Windows 11 Version 24h2
Windows 11 Version 25h2
Vendor
CVE Published:
13 October 2026

What is CVE-2026-97830?

A double free vulnerability in Windows Internet Information Services could allow an unauthorized attacker to execute a denial-of-service attack over a network. This issue can disrupt services, causing downtime and impacting user access. It’s crucial for organizations using IIS to apply the available patches to safeguard against potential exploitation.

Affected Version(s)

Windows 11 version 23H2 ARM64-based Systems 10.0.22631.0 < 10.0.22631.7652

Windows 11 Version 23H2 x64-based Systems 10.0.22631.0 < 10.0.22631.7652

Windows 11 Version 24H2 ARM64-based Systems 10.0.26100.0 < 10.0.26100.9711

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.