CVE-2021-26889 — HIGH (7.8)

Vulnerability Description

Windows Update Stack Elevation of Privilege Vulnerability

CVSS Score

7.8

HIGH

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Microsoft	Windows 10	20h2
Microsoft	Windows Server 2016	20h2
Microsoft	Windows Server 2019	-

Related Weaknesses (CWE)

CWE-59

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-2688PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-328/Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-2688PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-328/Third Party AdvisoryVDB Entry

FAQ

What is CVE-2021-26889?

CVE-2021-26889 is a vulnerability with a CVSS score of 7.8 (HIGH). Windows Update Stack Elevation of Privilege Vulnerability

How severe is CVE-2021-26889?

CVE-2021-26889 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-26889?

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.