Microsoft Surface Security Feature Bypass Vulnerability New

Security Vulnerability

Released: Feb 11, 2025

Assigning CNA
Microsoft
CVE.org link
CVE-2025-21194
Impact
Security Feature Bypass
Max Severity
Important
Weakness
CVSS Source
Microsoft
Vector String
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Please see Common Vulnerability Scoring System for more information on the definition of these metrics.

Exploitability

The following table provides an exploitability assessment for this vulnerability at the time of original publication.

Publicly disclosed
Yes
Exploited
No
Exploitability assessment
Exploitation Less Likely

FAQ

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires multiple conditions to be met, such as specific application behavior, user actions, manipulation of parameters passed to a function, and impersonation of an integrity level token.

According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires that an attacker will need to first gain access to the restricted network before running an attack.

What kind of security feature could be bypassed by successfully exploiting this vulnerability?

This Hypervisor vulnerability relates to Virtual Machines within a Unified Extensible Firmware Interface (UEFI) host machine. On some specific hardware it might be possible to bypass the UEFI, which could lead to the compromise of the hypervisor and the secure kernel.

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?

Successful exploitation of this vulnerability by an attacker requires a user to first reboot their machine.

What actions do customers need to perform to be protected against this vulnerability?

Surface devices get updates through Windows Update. See Surface update history for more information.

If you wish to install the updates manually, you can do the following:

  1. In the Surface app, expand Help & support to check the update status.
  2. If there are updates available, select the Check for updates button to open Windows Update and install the available updates.

Acknowledgements

  • Francisco Falcón and Iván Arce of Quarkslab
Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgements for more information.

Security Updates

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle.

Release date Descending

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

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