Remote code execution via undisclosed out-of-bounds read
Published Jan 10, 2023 · Updated Jan 1, 2025
Out-of-bounds read in Windows Authentication on Windows 10, Windows 11, and Server 2022 builds allows remote authenticated users to execute code. Microsoft identifies an out-of-bounds read but has not published the affected function, the input that reaches it, or the invalid read operation. Exploitation requires network access, valid low-privilege credentials, and high-complexity conditions; success grants code execution without user interaction.
Summary
What happened
Out-of-bounds read in Windows Authentication on Windows 10, Windows 11, and Server 2022 builds allows remote authenticated users to execute code. Microsoft identifies an out-of-bounds read but has not published the affected function, the input that reaches it, or the invalid read operation. Exploitation requires network access, valid low-privilege credentials, and high-complexity conditions; success grants code execution without user interaction.
The record
- CVE
- CVE-2023-21539
- Published
- Jan 10, 2023
- Updated
- Jan 1, 2025
- Vendor
- Microsoft
- Product
- Windows 11 version 21H2
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 10, 2023CVE publishedPublication date reported by the CVE source.
- Jan 1, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.0 <10.0.22000.1455
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo