---
id: "CVE-2026-119948"
page: "https://infrastack.ai/live/CVE-2026-119948"
kind: "vulnerability"
aliases: ["CVE-2026-119948"]
title: "Windows Active Directory: stack overflow lets an authorized user run code"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 Version 1607", "fixed": ["10.0.14393.9688"], "affected": "< 10.0.14393.9688", "ecosystem": "vendor"}, {"name": "Windows 10 Version 1809", "fixed": ["10.0.17763.9487"], "affected": "< 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows 10 Version 21H2", "fixed": ["10.0.19044.7846"], "affected": "< 10.0.19044.7846", "ecosystem": "vendor"}, {"name": "Windows 10 Version 22H2", "fixed": ["10.0.19045.7846"], "affected": "< 10.0.19045.7846", "ecosystem": "vendor"}, {"name": "Windows 11 Version 23H2", "fixed": ["10.0.22631.7711"], "affected": "< 10.0.22631.7711", "ecosystem": "vendor"}, {"name": "Windows 11 Version 24H2", "fixed": ["10.0.26100.9974"], "affected": "< 10.0.26100.9974", "ecosystem": "vendor"}]
ecosystems: []
tags: ["active-directory", "domain-controllers", "infrastructure", "windows"]
not_affected_if: ["cloud-only-entra", "no-active-directory"]
published_at: "2026-11-10T19:20:18+00:00"
first_seen_at: "2026-11-10T19:25:04+00:00"
updated_at: "2026-11-10T22:16:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119948", "first_seen_at": "2026-11-10T19:25:04+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-119948", "first_seen_at": "2026-11-10T22:16:36+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-119948", "https://radar.offseq.com/threat/cve-2026-119948-cwe-121-stack-based-buffer-overflow-in-microsoft-windows-10-version-1607-0470ac0fb03157dc"]}]
exploit_sources: []
---

# Windows Active Directory: stack overflow lets an authorized user run code

Link for people: https://infrastack.ai/live/CVE-2026-119948 (this .md is for agents)

A stack-based buffer overflow in Windows Active Directory can be triggered over the network by an attacker who already holds valid access. A successful attack lets the attacker execute code on the affected domain controller or directory server.

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

## Affected

- vendor:Windows 10 Version 1607 affected < 10.0.14393.9688 fixed 10.0.14393.9688
- vendor:Windows 10 Version 1809 affected < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows 10 Version 21H2 affected < 10.0.19044.7846 fixed 10.0.19044.7846
- vendor:Windows 10 Version 22H2 affected < 10.0.19045.7846 fixed 10.0.19045.7846
- vendor:Windows 11 Version 23H2 affected < 10.0.22631.7711 fixed 10.0.22631.7711
- vendor:Windows 11 Version 24H2 affected < 10.0.26100.9974 fixed 10.0.26100.9974

## How to check

Run winver or [System.Environment]::OSVersion on each domain controller/AD server and compare the build (e.g. 10.0.26100.x) with the fixed builds listed in the fix field; anything lower is exposed. Also check Windows Server builds against Microsoft's Security Update Guide entry for CVE-2026-119948.

## Fix

Install the November 2026 Windows cumulative update that brings the build to at least: Win10 1607 10.0.14393.9688, 1809 10.0.17763.9487, 21H2 10.0.19044.7846, 22H2 10.0.19045.7846, Win11 23H2 10.0.22631.7711, 24H2 10.0.26100.9974, 26H2 10.0.26300.9974 (per CVE-record mirrors; Windows Server builds and KB numbers not confirmed).

## Timeline

- 2026-11-10T19:25:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119948
- 2026-11-10T22:16:36+00:00 analyst https://app.opencve.io/cve/CVE-2026-119948 — MSRC page is JS-only and NVD fetch was empty, so no primary page read; versions come from CVE-record mirrors (OpenCVE, OffSeq), nothing verified. Windows Server builds and KB numbers not seen. Not exploited per mirrors (KEV no). Revisit when MSRC text is readable.

## Documents

- [describes] OpenCVE: CVE-2026-119948 (mirrors CVE record) https://app.opencve.io/cve/CVE-2026-119948
- [describes] OffSeq Threat Radar: CVE-2026-119948 https://radar.offseq.com/threat/cve-2026-119948-cwe-121-stack-based-buffer-overflow-in-microsoft-windows-10-version-1607-0470ac0fb03157dc

## From the sources

Stack-based buffer overflow in Windows Active Directory allows an authorized 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_