Windows Storage Elevation of Privilege Vulnerability in Microsoft Products
CVE-2025-21391

7.1HIGH

Key Information:

Vendor
Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
11 February 2025

Badges

📈 Trended📈 Score: 3,520👾 Exploit Exists🦅 CISA Reported📰 News Worthy

What is CVE-2025-21391?

CVE-2025-21391 is a security vulnerability in Microsoft's Windows operating system that allows for elevation of privilege. This flaw enables an attacker to gain higher-level permissions than intended, potentially allowing them to execute unauthorized commands or alter system settings. Such exploitation can have serious negative implications for organizations, leading to unauthorized access to sensitive data, disruption of services, or manipulation of critical systems.

Technical Details

The Windows Storage Elevation of Privilege Vulnerability affects specific Microsoft products and relates to improper handling of user permissions, which could be exploited by a malicious actor. When successfully exploited, this vulnerability could allow the attacker to gain elevated privileges, potentially leading to further exploitation of the affected systems.

Potential Impact of CVE-2025-21391

  1. Unauthorized Access to Sensitive Data: Attackers could access and manipulate sensitive information that is otherwise protected, leading to data breaches and loss of confidential information.

  2. System Compromise: The ability to elevate privileges increases the risk of full system compromise, enabling attackers to install malware, exfiltrate data, or disrupt system operations altogether.

  3. Service Disruption: Exploitation of this vulnerability could result in significant operational disruptions, affecting productivity and potentially leading to financial losses for organizations relying on the affected systems.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.10240.0 < 10.0.10240.20915

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.7785

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.6893

News Articles

favicon imageHelp Net Security

Week in review: Microsoft fixes two actively exploited 0-days, PAN-OS auth bypass hole plugged - Help Net Security

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Microsoft fixes two actively exploited zero-days

1 week ago

favicon imageHotHardware

February's Patch Tuesday Fixes Dozens Of Windows Security Flaws And Most Are Critical

Microsoft's latest updates fix 63 vulnerabilities of varying severity, so prep your system, save your personal data, and patch that PC.

1 week ago

favicon imageComputer Weekly

Microsoft’s February 2025 Patch Tuesday corrects 57 bugs, three cri...

Microsoft is correcting 57 vulnerabilities in its February Patch Tuesday, two of which are being actively exploited in the wild, and three of which are ‘critical’.

2 weeks ago

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 📈

    Vulnerability started trending

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • 📰

    First article discovered by Help Net Security

  • Vulnerability published

  • Vulnerability Reserved

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