CVE-2026-85835

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Buffer Over-Read in Windows Servicing Stack Updates

Publication date: 2026-10-13

Last updated on: 2026-10-13

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

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-85835

EUVD

EUVD-2026-99544

Affected Vendors & Products

Vendor	Product	Version / Range
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 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 disclose information locally on affected systems.

Impact Analysis

An attacker could gain access to sensitive information stored on your system by exploiting this vulnerability. Since it requires local access, physical or network-based access to the machine is necessary.

Compliance Impact

This vulnerability could lead to unauthorized disclosure of personal or sensitive data, which may violate compliance requirements under GDPR, HIPAA, or other regulations that mandate data protection and confidentiality.

Mitigation Strategies

Apply the latest Servicing Stack Updates from Microsoft to patch the buffer over-read vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

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