October 6, 2026

CVE Watchtower

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CVE-2021-42287NVD

Vulnerability Summary

Active Directory Domain Services Elevation of Privilege Vulnerability
Severity Level
HIGH(7.5)
Published Date
Nov 10, 2021
Last Modified
Aug 19, 2026
Exploitation Status
ACTIVE
EPSS Score (30-Day)
77.17%Probability
Root Weakness (CWE)
N/A
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Microsoft Windows Server 2004 < 10.0.19041.1348
  • Microsoft Windows Server 2008
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2016 < 10.0.14393.4770
  • Microsoft Windows Server 2019 < 10.0.17763.2300
  • Microsoft Windows Server 2022 < 10.0.20348.350
  • Microsoft Windows Server 20h2 < 10.0.19042.1348
Patched Versions
  • Microsoft Windows Server 2004 10.0.19041.1348
  • Microsoft Windows Server 2016 10.0.14393.4770
  • Microsoft Windows Server 2019 10.0.17763.2300
  • Microsoft Windows Server 2022 10.0.20348.350
  • Microsoft Windows Server 20h2 10.0.19042.1348
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References