CVE-2026-69425

Local file tampering via improper link resolution

Published Sep 8, 2026 · Updated Sep 10, 2026

Improper link resolution in Microsoft Windows 11 23H2 through 26H1 allows local users to tamper with files via crafted links. Microsoft identifies link resolution before file access as the faulty operation but has not disclosed the affected NTFS routine or triggering file operation. A low-privilege local account and a high-complexity setup are required; exploitation changes file data without disclosed confidentiality or availability impact.

CVSS severity4.7
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper link resolution in Microsoft Windows 11 23H2 through 26H1 allows local users to tamper with files via crafted links. Microsoft identifies link resolution before file access as the faulty operation but has not disclosed the affected NTFS routine or triggering file operation. A low-privilege local account and a high-complexity setup are required; exploitation changes file data without disclosed confidentiality or availability impact.

The record

CVE
CVE-2026-69425
Published
Sep 8, 2026
Updated
Sep 10, 2026
Vendor
Microsoft
Product
Windows 11, version 25H2
Classifications
CWE-59, CAPEC-132, CAPEC-35, CAPEC-17, CAPEC-76
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.26200.0 <10.0.26200.9445

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 11, version 25H2version=10.0.26200.0 <10.0.26200.9445
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.9445
Microsoft · Windows 11, version 26H1version=10.0.28000.0 <10.0.28000.2954
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.7582

Published CVSS scores

4.7MicrosoftCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
CAPEC-132Symlink Attack
CAPEC-35Leverage Executable Code in Non-Executable Files
CAPEC-17Using Malicious Files
CAPEC-76Manipulating Web Input to File System Calls

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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