High · published February 11, 2025
CVSS calls it high at 7.1. It is confirmed in active exploitation. It sits in the 83.0th percentile for exploit probability.
⚡ A sneaky elevation of privilege in Windows could put an attacker miles ahead — they gain full control with just a few clever moves! 🔥 Think of it like a backstage pass at a concert. If someone manages to swap their regular ticket for one that opens all the doors, they can access all areas and cause chaos behind the scenes. With this vulnerability, an attacker can elevate their privileges to an admin level, potentially allowing them to install malicious software, modify system settings, or steal sensitive data. This could lead to an absolute nightmare for your network if exploited!
Think of it like a backstage pass at a concert. If someone manages to swap their regular ticket for one that opens all the doors, they can access all areas and cause chaos behind the scenes. CVE-2025-21391 is a Windows Storage Elevation of Privilege Vulnerability that allows attackers with low-level access to elevate their privileges and gain unauthorized control over system resources. This flaw can be triggered through specially crafted requests that exploit the vulnerability in how Windows handles storage permissions.
With this vulnerability, an attacker can elevate their privileges to an admin level, potentially allowing them to install malicious software, modify system settings, or steal sensitive data. This could lead to an absolute nightmare for your network if exploited! To protect your systems, ensure that you apply the latest security updates from Microsoft immediately. Additionally, verify privilege levels for user accounts and conduct routine security audits to catch any unauthorized changes. Don't wait — secure your environment! You've got this! Follow these steps and solidify your defenses against this sneaky vulnerability. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/windows_10_1507 | < 10.0.10240.20915 | 10.0.10240.20915 |
| microsoft/windows_10_1507 | < 10.0.10240.20915 | 10.0.10240.20915 |
| microsoft/windows_10_1607 | < 10.0.14393.7785 | 10.0.14393.7785 |
| microsoft/windows_10_1607 | < 10.0.14393.7785 | 10.0.14393.7785 |
| microsoft/windows_10_1809 | < 10.0.17763.6893 | 10.0.17763.6893 |
| microsoft/windows_10_1809 | < 10.0.17763.6893 | 10.0.17763.6893 |
| microsoft/windows_10_21h2 | < 10.0.19044.5487 | 10.0.19044.5487 |
| microsoft/windows_10_22h2 | < 10.0.19045.5487 | 10.0.19045.5487 |
| microsoft/windows_11_22h2 | < 10.0.22621.4890 | 10.0.22621.4890 |
| microsoft/windows_11_23h2 | < 10.0.22631.4890 | 10.0.22631.4890 |
| microsoft/windows_11_24h2 | < 10.0.26100.3107 | 10.0.26100.3107 |
| microsoft/windows_server_2016 | < 10.0.14393.7785 | 10.0.14393.7785 |
| microsoft/windows_server_2019 | < 10.0.17763.6893 | 10.0.17763.6893 |
| microsoft/windows_server_2022 | < 10.0.20348.3148 | 10.0.20348.3148 |
| microsoft/windows_server_2022_23h2 | < 10.0.25398.1425 | 10.0.25398.1425 |
| microsoft/windows_server_2025 | < 10.0.26100.3107 | 10.0.26100.3107 |