Local data tampering via insecure temporary-file directory
Published Sep 8, 2026 · Updated Sep 10, 2026
Temporary-file permission weakness in Microsoft Windows Error Reporting on affected Windows releases allows local users to tamper with data. WER creates a temporary file inside a directory whose permissions permit low-privileged users to access or replace the file. Exploitation requires low-privileged local access; Microsoft reports high confidentiality and integrity effects but no service interruption.
Summary
What happened
Temporary-file permission weakness in Microsoft Windows Error Reporting on affected Windows releases allows local users to tamper with data. WER creates a temporary file inside a directory whose permissions permit low-privileged users to access or replace the file. Exploitation requires low-privileged local access; Microsoft reports high confidentiality and integrity effects but no service interruption.
The record
- CVE
- CVE-2026-69482
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-379, T1565
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=10.0.17763.0 <10.0.17763.9245
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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