CVE-2026-83719

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Buffer Over-Read in Windows Servicing Stack Updates

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Buffer over-read in Servicing Stack Updates allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-83719

EUVD

EUVD-2026-99344

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	10 Version 21H2 10.0.19044.0
Microsoft	Windows	10 Version 22H2 10.0.19045.0
Microsoft	Windows	11 version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 24H2 10.0.26100.0
Microsoft	Windows	11 Version 25H2 10.0.26200.0
Microsoft	Windows	11 version 26H1 10.0.28000.0
Microsoft	Windows	11 Version 26H2 10.0.26300.0
Microsoft	Windows	Server 2019 10.0.17763.0
Microsoft	Windows	Server 2019 (Server Core installation) 10.0.17763.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer over-read in Servicing Stack Updates. An authorized attacker can exploit it to read beyond the intended memory buffer and access sensitive information locally on the affected system.

Impact Analysis

An attacker could exploit this to access confidential data stored on your system, such as passwords or personal files, if they have local access. This could lead to further attacks or data breaches.

Compliance Impact

This vulnerability could lead to unauthorized data disclosure, violating GDPR and HIPAA requirements for protecting personal and health information. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Apply the latest Servicing Stack Updates from Microsoft to address the buffer over-read vulnerability. Regularly check for and install security updates on affected systems.

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