CVE-2026-21510
HIGH KEVMicrosoft Windows Shell - Protection Mechanism Failure
Title source: llmDescription
Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
Exploits (2)
github
WORKING POC
10 stars
by XiaomingX · pythonpoc
https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-21510
nomisec
WRITEUP
1 stars
by andreassudo · poc
https://github.com/andreassudo/CVE-2026-21510-CVSS-8.8-Important-Windows-Shell-security-feature-bypass
Scores
CVSS v3
8.8
EPSS
0.0335
EPSS Percentile
87.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CISA KEV
2026-02-10
VulnCheck KEV
2026-02-10
ENISA EUVD
EUVD-2026-7337
CWE
CWE-693
Status
published
Products (36)
microsoft/windows_10_1607
< 10.0.14393.8868 (2 CPE variants)
microsoft/windows_10_1809
< 10.0.17763.8389 (2 CPE variants)
microsoft/windows_10_21h2
< 10.0.19044.6937 (3 CPE variants)
microsoft/windows_10_22h2
< 10.0.19045.6937 (3 CPE variants)
Microsoft/Windows 10 Version 1607
10.0.14393.0 - 10.0.14393.8868
Microsoft/Windows 10 Version 1809
10.0.17763.0 - 10.0.17763.8389
Microsoft/Windows 10 Version 21H2
10.0.19044.0 - 10.0.19044.6937
Microsoft/Windows 10 Version 22H2
10.0.19045.0 - 10.0.19045.6937
microsoft/windows_11_23h2
< 10.0.22631.6649 (2 CPE variants)
microsoft/windows_11_24h2
< 10.0.26100.7781 (2 CPE variants)
... and 26 more
Published
Feb 10, 2026
KEV Added
Feb 10, 2026
Tracked Since
Feb 18, 2026