CVE-2021-26866 — HIGH (7.1)

Vulnerability Description

Windows Update Service Elevation of Privilege Vulnerability

CVSS Score

7.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Microsoft	Windows 10	-
Microsoft	Windows Server 2016	-
Microsoft	Windows Server 2019	-

Related Weaknesses (CWE)

CWE-59

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-2686PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-286/Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-2686PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-286/Third Party AdvisoryVDB Entry

FAQ

What is CVE-2021-26866?

CVE-2021-26866 is a vulnerability with a CVSS score of 7.1 (HIGH). Windows Update Service Elevation of Privilege Vulnerability

How severe is CVE-2021-26866?

CVE-2021-26866 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-26866?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10, Microsoft Windows Server 2016, Microsoft Windows Server 2019.