CVE-2025-21211 is a Secure Boot Security Feature Bypass Vulnerability that affects multiple versions of Microsoft Windows, including Windows 10 and Windows Server. The CVSS score for this vulnerability is 6.8, indicating a medium severity level. This vulnerability allows attackers to bypass secure boot features, which can lead to unauthorized access and exploitation of system resources. The urgency for defenders is high, as the potential impact on confidentiality, integrity, and availability is significant.
Organizations should prioritize patching immediately. The vulnerability impacts a wide range of Windows products, making it crucial for administrators to assess their systems promptly and apply necessary updates.
The exploitability score for this vulnerability is 0.9, indicating it is relatively easy to exploit. However, as of the latest data, there are no confirmed public exploits or known exploitation in the wild, which gives organizations a window to address the issue before it can be actively exploited.
Organizations running affected versions should take this vulnerability seriously and ensure that they are prepared to implement the necessary patches as soon as they are available.
The vulnerability was published on January 14, 2025, and Microsoft has classified it under CWE-693. The potential blast radius of this vulnerability is significant, affecting a wide range of systems and configurations.
Vulnerability Details
CVE-2025-21211 is classified as a Secure Boot Security Feature Bypass Vulnerability. It is scored at 6.8 on the CVSS scale, indicating medium severity. The vulnerability impacts confidentiality, integrity, and availability due to its capability to bypass secure boot mechanisms. The affected products include multiple versions of Windows 10 and Windows Server, highlighting the broad impact of this vulnerability.
This vulnerability affects Windows 10 versions 1507, 1607, 1809, 21H2, 22H2, and Windows 11 versions 22H2, 23H2, and 24H2, along with various Windows Server versions. The publication date for this vulnerability was January 14, 2025.
Technical Analysis
The root cause of CVE-2025-21211 is related to secure boot security features being improperly implemented, which allows an attacker with physical access to bypass these security measures. The attack vector is categorized as physical, meaning an attacker must have physical access to the targeted system.
The attack complexity is low, requiring no special privileges or user interaction, making this vulnerability particularly concerning for organizations. The impacts on confidentiality, integrity, and availability are classified as high, which reflects the serious nature of the potential exploit.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to secure systems, potential data breaches, and disruption of services due to the vulnerability's ability to bypass secure boot features. The blast radius is significant due to the number of affected products and configurations.
Organizations should schedule remediation as a priority, given the medium severity of this vulnerability and the high potential impact on their systems. The urgency assessment based on CVSS indicates that this should be addressed in the priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected, including Windows 10 versions 1507, 1607, 1809, 21H2, 22H2, and Windows 11 versions 22H2, 23H2, and 24H2, along with various Windows Server versions.
Mitigation & Remediation
Organizations should patch to the latest versions as soon as updates are available. For those unable to apply patches immediately, consider implementing additional security measures, such as restricting physical access to affected systems and enhancing monitoring for suspicious activities.
For comprehensive security assessments, organizations can engage in continuous penetration testing to identify and remediate similar vulnerabilities.
Detection Guidance
Monitoring for indicators of compromise related to secure boot bypass attempts is critical. Organizations should look for behavioral anomalies, unexpected system changes, and logs that indicate physical access attempts to secure systems.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-21211 lies in its representation of vulnerabilities related to secure boot mechanisms. Security teams should analyze the patterns this vulnerability highlights regarding physical security and secure system configurations.
Organizations are encouraged to review their security policies and procedures to ensure robust defenses against similar vulnerabilities. For additional insights, security teams can refer to the following resources: penetration testing methodology, vulnerability management program design, and cloud penetration testing for further guidance.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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