---
id: "CVE-2023-23376"
kind: "vulnerability"
aliases: ["CVE-2023-23376"]
title: "Windows Common Log File System Driver Elevation of Privilege Vulnerability"
severity: "high"
cvss: 7.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1507", "fixed": ["10.0.10240.19747"], "affected": "< 10.0.10240.19747", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1607", "fixed": ["10.0.14393.5717"], "affected": "< 10.0.14393.5717", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.4010"], "affected": "< 10.0.17763.4010", "ecosystem": "vendor"}, {"name": "microsoft windows 10 20h2", "fixed": ["10.0.19042.2604"], "affected": "< 10.0.19042.2604", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.2604"], "affected": "< 10.0.19044.2604", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19045.2604"], "affected": "< 10.0.19045.2604", "ecosystem": "vendor"}, {"name": "microsoft windows 11 21h2", "fixed": ["10.0.22000.1574"], "affected": "< 10.0.22000.1574", "ecosystem": "vendor"}, {"name": "microsoft windows 11 22h2", "fixed": ["10.0.22621.1265"], "affected": "< 10.0.22621.1265", "ecosystem": "vendor"}, {"name": "microsoft windows server 2008", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2008", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": ["10.0.14393.5717"], "affected": "< 10.0.14393.5717", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.4010"], "affected": "< 10.0.17763.4010", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.1540"], "affected": "< 10.0.20348.1540", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "ransomware", "windows"]
not_affected_if: []
published_at: "2023-02-14T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-23376", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-23376", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Windows Common Log File System Driver Elevation of Privilege Vulnerability

Microsoft Windows' Common Log File System (CLFS) driver has a flaw that lets a local user escalate privileges. Exploitation in the wild is confirmed and the tag indicates ransomware use, so an attacker with a foothold on a Windows machine can gain SYSTEM rights.

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

## Affected

- vendor:Microsoft Windows affected ? fixed ?
- vendor:microsoft windows 10 1507 affected < 10.0.10240.19747 fixed 10.0.10240.19747
- vendor:microsoft windows 10 1607 affected < 10.0.14393.5717 fixed 10.0.14393.5717
- vendor:microsoft windows 10 1809 affected < 10.0.17763.4010 fixed 10.0.17763.4010
- vendor:microsoft windows 10 20h2 affected < 10.0.19042.2604 fixed 10.0.19042.2604
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.2604 fixed 10.0.19044.2604
- vendor:microsoft windows 10 22h2 affected < 10.0.19045.2604 fixed 10.0.19045.2604
- vendor:microsoft windows 11 21h2 affected < 10.0.22000.1574 fixed 10.0.22000.1574
- vendor:microsoft windows 11 22h2 affected < 10.0.22621.1265 fixed 10.0.22621.1265
- vendor:microsoft windows server 2008 affected ? fixed ?
- vendor:microsoft windows server 2008 affected = r2 fixed ?
- vendor:microsoft windows server 2012 affected ? fixed ?
- vendor:microsoft windows server 2012 affected = r2 fixed ?
- vendor:microsoft windows server 2016 affected < 10.0.14393.5717 fixed 10.0.14393.5717
- vendor:microsoft windows server 2019 affected < 10.0.17763.4010 fixed 10.0.17763.4010
- vendor:microsoft windows server 2022 affected < 10.0.20348.1540 fixed 10.0.20348.1540

## Fix

Apply the Microsoft Windows security update for CVE-2023-23376 per vendor instructions (CISA KEV required action).
Fix version list: unknown

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-23376
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-23376

## From the sources

Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that allows for privilege escalation.

CISA required action: Apply updates per vendor instructions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_