CVE-2026-70024: Microsoft Windows Internet Information Services stack buffer overflow

CVE-2026-70024 · Severity: critical · CVSS 9.8 · Published 2026-10-13

Windows Internet Information Services (IIS), a web server component used to host websites and applications, contains a stack-based buffer overflow vulnerability that allows attackers to remotely execute code. An attacker can exploit this over the network without authentication to gain full control of the affected server.

Technologies: Microsoft Windows Internet Information Services. Vendors: Microsoft.

Quick answers

Is CVE-2026-70024 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-70024 being exploited in the wild.
How severe is CVE-2026-70024?
Critical severity, with a CVSS score of 9.8, published 13 October 2026.
Which products and versions are affected?
Microsoft Windows Internet Information Services.
Is there a fix for CVE-2026-70024?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-70024 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-70024?
Check whether you run Microsoft Windows Internet Information Services. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow in Windows IIS permits remote code execution via network attack without authentication. The vulnerability allows an unauthenticated attacker to overflow a stack buffer and execute arbitrary code with the privileges of the IIS process.

Affected products

  • Microsoft Windows Internet Information Services

Timeline

  • 2026-10-13: disclosed

References

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