Out-of-Bounds Read in BranchCache

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Out-of-bounds read in BranchCache allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-69329

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read in BranchCache, a feature that allows data to be cached locally to reduce network traffic. An unauthorized attacker can exploit this to cause a denial of service over a network by triggering an out-of-bounds memory read.

Impact Analysis

The impact includes network service disruption, as the vulnerability allows an attacker to deny service without needing authentication or user interaction. Systems using BranchCache may experience crashes or instability.

Mitigation Strategies

Apply the latest security updates from Microsoft to address the BranchCache out-of-bounds read vulnerability. Monitor network traffic for unusual patterns that may indicate denial-of-service attempts.

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