---
title: "CVE-2023-36424: Microsoft Windows Out-of-Bounds Read Vulnerability"
url: https://erroneo.us/security/cve/CVE-2023-36424/
description: "CVE-2023-36424 (Microsoft Windows): Exploited in the wild (CISA KEV). Windows Common Log File System Driver Elevation of Privilege Vulnerability"
type: vulnerability-record
section: "Security Digest"
date_published: 2023-11-14
date_modified: 2026-04-14
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-36424"
kev: true
cvss: 7.8
epss: 0.12087
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-36424: Microsoft Windows Out-of-Bounds Read Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Microsoft Windows. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-04-13, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-04-27 ; treat that as the outer limit, not the target.
- EPSS 12.1% , percentile 96: FIRST’s model estimates a 12.1% chance of exploitation activity in the next 30 days, higher than 96% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.

## What it is

Windows Common Log File System Driver Elevation of Privilege Vulnerability

## Affected products (CVE record)

- Microsoft Windows 11 version 22H3: 10.0.22631.0 < 10.0.22631.2715
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): 10.0.25398.0 < 10.0.25398.531
- Microsoft Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.2715
- Microsoft Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.5122
- Microsoft Windows 10 Version 1809: 10.0.0 < 10.0.17763.5122
- Microsoft Windows Server 2019: 10.0.17763.0 < 10.0.17763.5122
- Microsoft Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.5122
- Microsoft Windows Server 2022: 10.0.20348.0 < 10.0.20348.2113
- Microsoft Windows 11 version 21H2: 10.0.0 < 10.0.22000.2600
- Microsoft Windows 10 Version 21H2: 10.0.19043.0 < 10.0.19043.3693

## Severity

- microsoft CVSS 3.1: 7.8 `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`

## Exploitation

- CISA KEV: added 2026-04-13; federal due date 2026-04-27. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 12.09% probability of exploitation activity in the next 30 days; percentile 96.

## Sources

- [Windows Common Log File System Driver Elevation of Privilege Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36424)
- [Listed in CISA KEV notes (msrc.microsoft.com)](https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-36424)
- [CVE.org record CVE-2023-36424](https://www.cve.org/CVERecord?id=CVE-2023-36424)
- [NVD entry CVE-2023-36424](https://nvd.nist.gov/vuln/detail/CVE-2023-36424)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36424)

---
Source page: https://erroneo.us/security/cve/CVE-2023-36424/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt