# CVE-2026-119961: Microsoft Windows Internet Information Services race condition

Source: https://junglewise.ai/threats/cve-2026-119961-concurrent-execution-using-shared-resource-with-improper  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-119961 · Severity: high · CVSS 8.1 · Published 2026-11-10

A race condition vulnerability in Microsoft Windows Internet Information Services (IIS), which hosts web applications and content for businesses, could allow an attacker to execute malicious code remotely on an affected server. An attacker could exploit this flaw without authentication to gain unauthorized control over the web server and any applications it hosts.

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-2026-119961 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119961 being exploited in the wild.

**How severe is CVE-2026-119961?** High severity, with a CVSS score of 8.1, published 10 November 2026.

**Which products and versions are affected?** Microsoft Windows Internet Information Services.

**Is there a fix for CVE-2026-119961?** 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-2026-119961 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-119961?** 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 concurrent execution vulnerability using improper synchronization in a shared resource within IIS creates a race condition that can be exploited over the network. The vulnerability allows unauthenticated remote code execution; specific preconditions and patched versions are unavailable from the references provided.

## Affected products

- Microsoft Windows Internet Information Services

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119961](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119961)

## Related threats

- [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)
- [Microsoft Windows Internet Information Services stack buffer overflow](https://junglewise.ai/threats/cve-2026-70024-stack-based-buffer-overflow-in-windows-internet-information)