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CVE-2021-42297

26
FAUCET Score

CVE-2021-42297 is an Elevation of Privilege vulnerability affecting the Microsoft Windows 10 Update Assistant. It carries a high CVSS score of 7.8, indicating a significant risk where an attacker could gain elevated privileges on an affected system through a low-complexity attack requiring user interaction. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for high impact on confidentiality, integrity, and availability necessitates attention.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:windows_10_update_assistant:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.0MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.3
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.45%
Probability of exploitation in next 30 days
EPSS Percentile
70.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0145 is in the 69th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Windows Update Assistant
View patch

Vendor Advisories (1)

microsoft2021-Nov/CVE-2021-42297Important

Windows 10 Update Assistant Elevation of Privilege Vulnerability

Nov 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-42297
PatchVendor Advisory
zerodayinitiative.com / advisories/ZDI-21-1334
ExploitThird Party AdvisoryVDB Entry