Path Traversal in Microsoft Windows_10_1507
CVE-2021-40444
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Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.968 (99.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L.
Affected products
- Microsoft Windows_10_1507
- Microsoft Windows_10_1607
- Microsoft Windows_10_1809
- Microsoft Windows_10_1909
- Microsoft Windows_10_2004
- Microsoft Windows_10_20h2
- Microsoft Windows_10_21h1
- Microsoft Windows 10 Version 1507 — versions 10.0.0
- Microsoft Windows 10 Version 1607 — versions 10.0.0
- Microsoft Windows 10 Version 1809 — versions 10.0.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- secure@microsoft.com (Patch, x_refsource_MISC, Mitigation, Vendor Advisory)
- secure@microsoft.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- secure@microsoft.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- secure@microsoft.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-40444?
- CVE-2021-40444 is a high-severity vulnerability in Microsoft Windows_10_1507, classified under Path Traversal. CVSS score: 8.8/10. Published 2021-09-15.
- How severe is CVE-2021-40444?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-40444 known to be exploited?
- Yes. CVE-2021-40444 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 183 public proof-of-concept repositories are indexed.