5.5Medium
Microsoft Windows 10
CVE-2021-38637
Windows Storage Information Disclosure Vulnerability
What this means for your business
- It affects Microsoft Windows 10. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it only with access to the machine itself, with an ordinary user login, and without anyone at your company clicking anything.
What to do
- 1Check whether your company or your suppliers run Microsoft Windows 10, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 5.5 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Assigned by
- secure@microsoft.com
Dates
- Published
- 2021-09-15
- Last modified
- 2026-08-10
- Sources
- NVD
Affected products
- Microsoft Windows 1020h2, 21h1, 1809, 1909, 2004
- Microsoft Windows Server 201620h2, 2004
- Microsoft Windows Server 2019all versions
- Microsoft Windows Server 2022all versions
As listed in the NVD configuration data. Not a statement about your estate.