How severe is CVE-2021-43211?

CVE-2021-43211 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-43211 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43211?

CVE-2021-43211 affects Microsoft Windows 10 Update Assistant. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43211?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-43211 published?

CVE-2021-43211 was published on 2021-11-24 and last updated on 2026-06-17.

CVE-2021-43211

CVE-2021-43211 is a medium-severity vulnerability in Microsoft Windows 10 Update Assistant with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 6.6
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Microsoft Windows 10 Update Assistant
Published: 2021-11-24
Last modified: 2026-06-17

Description

Windows 10 Update Assistant Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2021-43211?: Windows 10 Update Assistant Elevation of Privilege Vulnerability
How severe is CVE-2021-43211?: CVE-2021-43211 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-43211 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43211?: CVE-2021-43211 affects Microsoft Windows 10 Update Assistant. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43211?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43211 published?: CVE-2021-43211 was published on 2021-11-24 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43211

Affected products (1)

cpe:2.3:a:microsoft:windows_10_update_assistant:-:*:*:*:*:*:*:*

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