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

Source: https://junglewise.ai/threats/cve-2026-70024-stack-based-buffer-overflow-in-windows-internet-information  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/windows-internet-information-services). Vendors: [Microsoft](https://junglewise.ai/threats/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

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70024](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70024)

## Related threats

- [Microsoft Windows Internet Information Services race condition](https://junglewise.ai/threats/cve-2026-119961-concurrent-execution-using-shared-resource-with-improper)
- [Windows Internet Information Services integer underflow denial of service](https://junglewise.ai/threats/cve-2026-119936-integer-underflow-wrap-or-wraparound-in-windows-internet)
- [Windows Internet Information Services heap buffer overflow](https://junglewise.ai/threats/cve-2026-78459-heap-based-buffer-overflow-in-windows-internet-information)