Vulnerability in Microsoft Windows 10 Version 1507

CVE-2021-28476

Windows Hyper-V Remote Code Execution Vulnerability

EPSS: 0.551 (98.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft Windows 10 Version 1507 — versions 10.0.0
Microsoft Windows 10 Version 1607 — versions 10.0.0
Microsoft Windows 10 Version 1803 — versions 10.0.0
Microsoft Windows 10 Version 1809 — versions 10.0.0
Microsoft Windows 10 Version 1909 — versions 10.0.0
Microsoft Windows 10 Version 2004 — versions 10.0.0
Microsoft Windows 7 Service Pack 1 — versions 6.1.0
Microsoft Windows 8.1 — versions 6.3.0
Microsoft Windows Server 2008 R2 Service Pack 1 — versions 6.1.0
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core Installation) — versions 6.0.0

Public proof-of-concept exploits

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28476 (x_refsource_MISC)
packetstormsecurity.com/files/163497/Microsoft-Hyper-V-vmswitch.sys-Proof-Of-Co… (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-28476?: CVE-2021-28476 is a critical-severity vulnerability in Microsoft Windows 10 Version 1507. CVSS score: 9.9/10. Published 2021-05-11.
How severe is CVE-2021-28476?: Critical severity. CVSS v3 base score is 9.9 out of 10.
Is CVE-2021-28476 known to be exploited?: 29 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.