---
id: "CVE-2026-119393"
page: "https://infrastack.ai/live/CVE-2026-119393"
kind: "vulnerability"
aliases: ["CVE-2026-119393"]
title: "Windows Credential Manager stack overflow lets a local user gain higher privileges (fixed in November 2026 updates)"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 1607 / Server 2016", "fixed": ["10.0.14393.9688"], "affected": "10.0.14393.0 - < 10.0.14393.9688", "ecosystem": "vendor"}, {"name": "Windows 10 1809 / Server 2019", "fixed": ["10.0.17763.9487"], "affected": "10.0.17763.0 - < 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": "10.0.19044.0 - < 10.0.19044.7846", "ecosystem": "vendor"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": "10.0.19045.0 - < 10.0.19045.7846", "ecosystem": "vendor"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": "10.0.22631.0 - < 10.0.22631.7711", "ecosystem": "vendor"}, {"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": "10.0.26100.0 - < 10.0.26100.9974", "ecosystem": "vendor"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": "10.0.26200.0 - < 10.0.26200.9974", "ecosystem": "vendor"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": "10.0.28000.0 - < 10.0.28000.3501", "ecosystem": "vendor"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": "10.0.26300.0 - < 10.0.26300.9974", "ecosystem": "vendor"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": "10.0.20348.0 - < 10.0.20348.5870", "ecosystem": "vendor"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": "10.0.26100.0 - < 10.0.26100.33822", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["credential-manager", "infrastructure", "local-privilege-escalation", "windows", "windows-server"]
not_affected_if: ["patched-nov-2026"]
published_at: "2026-11-10T19:19:53+00:00"
first_seen_at: "2026-11-10T19:24:56+00:00"
updated_at: "2026-11-10T22:54:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119393", "first_seen_at": "2026-11-10T19:24:56+00:00"}, {"source": "analyst", "url": "https://nvd.nist.gov/vuln/detail/cve-2026-119393", "first_seen_at": "2026-11-10T22:54:43+00:00", "cites": ["https://nvd.nist.gov/vuln/detail/cve-2026-119393", "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119393"]}]
exploit_sources: []
---

# Windows Credential Manager stack overflow lets a local user gain higher privileges (fixed in November 2026 updates)

Link for people: https://infrastack.ai/live/CVE-2026-119393 (this .md is for agents)

Stack-based buffer overflow (CWE-121) in Windows Credential Manager lets an attacker with a local low-privilege account elevate privileges (CVSS 7.8, local, no user interaction). Microsoft's CVE record lists fixed builds for Windows 10, 11 and Server 2016-2025; not reported exploited. Exact trigger not published.

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

## Affected

- vendor:Windows 10 1607 / Server 2016 affected 10.0.14393.0 - < 10.0.14393.9688 fixed 10.0.14393.9688
- vendor:Windows 10 1809 / Server 2019 affected 10.0.17763.0 - < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows 10 21H2 affected 10.0.19044.0 - < 10.0.19044.7846 fixed 10.0.19044.7846
- vendor:Windows 10 22H2 affected 10.0.19045.0 - < 10.0.19045.7846 fixed 10.0.19045.7846
- vendor:Windows 11 23H2 affected 10.0.22631.0 - < 10.0.22631.7711 fixed 10.0.22631.7711
- vendor:Windows 11 24H2 affected 10.0.26100.0 - < 10.0.26100.9974 fixed 10.0.26100.9974
- vendor:Windows 11 25H2 affected 10.0.26200.0 - < 10.0.26200.9974 fixed 10.0.26200.9974
- vendor:Windows 11 26H1 affected 10.0.28000.0 - < 10.0.28000.3501 fixed 10.0.28000.3501
- vendor:Windows 11 26H2 affected 10.0.26300.0 - < 10.0.26300.9974 fixed 10.0.26300.9974
- vendor:Windows Server 2022 affected 10.0.20348.0 - < 10.0.20348.5870 fixed 10.0.20348.5870
- vendor:Windows Server 2025 affected 10.0.26100.0 - < 10.0.26100.33822 fixed 10.0.26100.33822

## How to check

Run winver or 'cmd /c ver' and compare the build (10.0.X.Y) to the fixed builds: 1607/Server 2016 14393.9688; 1809/Server 2019 17763.9487; 10 21H2 19044.7846; 10 22H2 19045.7846; 11 23H2 22631.7711; 11 24H2 26100.9974; 11 25H2 26200.9974; 11 26H1 28000.3501; 11 26H2 26300.9974; Server 2022 20348.5870; Server 2025 26100.33822. Lower means exposed.

## Fix

Install the November 2026 Windows security update (Patch Tuesday, 2026-11-10) so the build is at or above the fixed build for your version. No workaround published.

## Timeline

- 2026-11-10T19:24:56+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119393
- 2026-11-10T22:54:43+00:00 analyst https://nvd.nist.gov/vuln/detail/cve-2026-119393 — Builds/fixes from Microsoft's CNA record mirrored on NVD; MSRC update guide is JS-only and unreadable here, so nothing marked verified. Not exploited per sources; no PoC found. No KB numbers found.

## Documents

- [advisory] NVD CVE-2026-119393 (Microsoft CNA record, affected builds) https://nvd.nist.gov/vuln/detail/cve-2026-119393
- [fix] MSRC Security Update Guide CVE-2026-119393 (JS-only, not readable) https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119393

## From the sources

Stack-based buffer overflow in Windows Credential Manager allows an authorized attacker to elevate privileges locally.

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