CVE-2026-27913

Received Received - Intake

Improper Input Validation in Windows BitLocker Enables Local Bypass

Publication date: 2026-04-14

Last updated on: 2026-04-23

Assigner: Microsoft Corporation

Description

Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-14

Last Modified

2026-04-23

Generated

2026-07-06

AI Q&A

2026-04-15

EPSS Evaluated

2026-07-05

NVD

CVE-2026-27913

EUVD

EUVD-2026-22455

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_server_2016	to 10.0.14393.9060 (exc)
microsoft	windows_server_2019	to 10.0.17763.8644 (exc)
microsoft	windows_server_2022	to 10.0.20348.5020 (exc)
microsoft	windows_server_2022_23h2	to 10.0.25398.2274 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability is caused by improper input validation in Windows BitLocker. It allows an unauthorized attacker to bypass a security feature locally on the affected system.

Impact Analysis

The vulnerability can impact you by allowing an unauthorized attacker to bypass security features of Windows BitLocker, potentially compromising the confidentiality and integrity of your encrypted data.

Mitigation Strategies

To mitigate this vulnerability, it is important to apply the security updates provided by Microsoft for Windows BitLocker as soon as they are available.

Since the vulnerability involves improper input validation allowing a local attacker to bypass security features, ensuring that all systems are updated and that local access is restricted to trusted users can help reduce risk.

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