---
id: "CVE-2026-119961"
page: "https://infrastack.ai/live/CVE-2026-119961"
kind: "vulnerability"
aliases: ["CVE-2026-119961"]
title: "Windows IIS: race condition lets an unauthorized attacker run code remotely"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["iis", "infrastructure", "windows", "windows-server"]
not_affected_if: []
published_at: "2026-11-10T19:20:20+00:00"
first_seen_at: "2026-11-10T19:25:05+00:00"
updated_at: "2026-11-10T19:34:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119961", "first_seen_at": "2026-11-10T19:25:05+00:00"}]
exploit_sources: []
---

# Windows IIS: race condition lets an unauthorized attacker run code remotely

Link for people: https://infrastack.ai/live/CVE-2026-119961 (this .md is for agents)

A race condition in Windows Internet Information Services (IIS) lets an attacker execute code over the network. The sources give no further detail on the exact trigger.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the Windows build and IIS presence with `Get-WindowsFeature Web-Server` on Windows Server, or confirm the IIS role is installed in Server Manager.
- Compare the installed cumulative update against the Microsoft security update guide entry for CVE-2026-119961.

## Timeline

- 2026-11-10T19:25:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119961

## From the sources

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Internet Information Services allows an unauthorized attacker to execute code over a network.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_