Microsoft Windows Storage Link Following Vulnerability
Windows Storage Elevation of Privilege Vulnerability
What happened
Windows Storage Elevation of Privilege Vulnerability
CISA lists it as exploited, added 11 Feb 2025.
Does it affect you
Names Microsoft Windows Server. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Apply the vendor patch named in this advisory.
msrc.microsoft.com - Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- ms-winserver
- Microsoft Windows Server: everything below 10.0.14393.7785
The record
- NVD status
- Analyzed
- Published
- 11 Feb 2025, last modified 24 Sep 2026 (NVD)
- Severity
- CVSS 3.1 base score 7.1, High — computed here from the vector; NVD states 7.1.
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Weakness
- CWE-59 Improper Link Resolution Before File Access ('Link Following') (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 11 Feb 2025; federal remediation due 04 Mar 2025. CISA entry
- Exploit probability
- EPSS 2.3%, 83rd percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Microsoft · Windows (CISA)
References on the NVD record
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21391PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21391US Government Resource
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.