Protected-session access via undisclosed lock-screen flaw
Published Apr 11, 2023 · Updated Jan 23, 2025
Security feature bypass in Microsoft Windows Lock Screen allows physically proximate attackers to access a protected session without authentication. Microsoft has not published the flawed component or the operation that incorrectly authorizes access from the lock screen. Physical access to a locked affected device is required; successful exploitation crosses the lock screen's access boundary.
Summary
What happened
Security feature bypass in Microsoft Windows Lock Screen allows physically proximate attackers to access a protected session without authentication. Microsoft has not published the flawed component or the operation that incorrectly authorizes access from the lock screen. Physical access to a locked affected device is required; successful exploitation crosses the lock screen's access boundary.
The record
- CVE
- CVE-2023-28270
- Published
- Apr 11, 2023
- Updated
- Jan 23, 2025
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-863
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 11, 2023CVE publishedPublication date reported by the CVE source.
- Jan 23, 2025Record 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 <10.0.17763.4252
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
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Your stack
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