October 13, 2026

CVE Watchtower

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CVE-2021-40449NVD

Vulnerability Summary

No description available
Severity Level
HIGH(7.8)
Published Date
Oct 13, 2021
Last Modified
Oct 21, 2025
PoC
Available(Metasploit)
Exploitation Status
ACTIVE
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
N/A
CVSS v3.1 Base Metrics — Score 7.8 (HIGH)
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Microsoft Windows 10 Version 1809 >= 10.0.0 and < 10.0.17763.2237
  • Microsoft Windows Server 2019 >= 10.0.0 and < 10.0.17763.2237
  • Microsoft Windows Server 2019 (Server Core installation) >= 10.0.0 and < 10.0.17763.2237
  • Microsoft Windows 10 Version 1909 >= 10.0.0 and < 10.0.18363.1854
  • Microsoft Windows 10 Version 21H1 >= 10.0.0 and < 10.0.19041.1288
  • Microsoft Windows Server 2022 >= 10.0.0 and < 10.0.20348.288
  • Microsoft Windows 10 Version 2004 >= 10.0.0 and < 10.0.19041.1288
  • Microsoft Windows Server version 2004 >= 10.0.0 and < 10.0.19041.1288
  • Microsoft Windows 10 Version 20H2 >= 10.0.0 and < 10.0.19041.1288
  • Microsoft Windows Server version 20H2 >= 10.0.0 and < 10.0.19042.1288
  • Microsoft Windows 11 version 21H2 >= 10.0.0 and < 10.0.22000.258
  • Microsoft Windows 10 Version 1507 >= 10.0.0 and < 10.0.10240.19086
  • Microsoft Windows 10 Version 1607 >= 10.0.0 and < 10.0.14393.4704
  • Microsoft Windows Server 2016 >= 10.0.0 and < 10.0.14393.4704
  • Microsoft Windows Server 2016 (Server Core installation) >= 10.0.0 and < 10.0.14393.4704
  • Microsoft Windows 7 >= 6.1.0 and < 6.1.7601.25740
  • Microsoft Windows 7 Service Pack 1 >= 6.1.0 and < 6.1.7601.25740
  • Microsoft Windows 8.1 >= 6.3.0 and < 6.3.9600.20144
  • Microsoft Windows Server 2008 Service Pack 2 >= 6.0.0 and < 6.0.6003.21251
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) >= 6.0.0 and < 6.0.6003.21251
  • Microsoft Windows Server 2008 Service Pack 2 >= 6.0.0 and < 6.0.6003.21251
  • Microsoft Windows Server 2008 R2 Service Pack 1 >= 6.1.0 and < 6.1.7601.25740
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) >= 6.0.0 and < 6.1.7601.25740
  • Microsoft Windows Server 2012 >= 6.2.0 and < 6.2.9200.23490
  • Microsoft Windows Server 2012 (Server Core installation) >= 6.2.0 and < 6.2.9200.23490
  • Microsoft Windows Server 2012 R2 >= 6.3.0 and < 6.3.9600.20144
  • Microsoft Windows Server 2012 R2 (Server Core installation) >= 6.3.0 and < 6.3.9600.20144
Patched Versions
  • Microsoft Windows 10 Version 1809 10.0.17763.2237
  • Microsoft Windows Server 2019 10.0.17763.2237
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2237
  • Microsoft Windows 10 Version 1909 10.0.18363.1854
  • Microsoft Windows 10 Version 21H1 10.0.19041.1288
  • Microsoft Windows Server 2022 10.0.20348.288
  • Microsoft Windows 10 Version 2004 10.0.19041.1288
  • Microsoft Windows Server version 2004 10.0.19041.1288
  • Microsoft Windows 10 Version 20H2 10.0.19041.1288
  • Microsoft Windows Server version 20H2 10.0.19042.1288
  • Microsoft Windows 11 version 21H2 10.0.22000.258
  • Microsoft Windows 10 Version 1507 10.0.10240.19086
  • Microsoft Windows 10 Version 1607 10.0.14393.4704
  • Microsoft Windows Server 2016 10.0.14393.4704
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4704
  • Microsoft Windows 7 6.1.7601.25740
  • Microsoft Windows 7 Service Pack 1 6.1.7601.25740
  • Microsoft Windows 8.1 6.3.9600.20144
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21251
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.21251
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21251
  • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.25740
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.25740
  • Microsoft Windows Server 2012 6.2.9200.23490
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.23490
  • Microsoft Windows Server 2012 R2 6.3.9600.20144
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20144
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🚫Ad-Free — Uninterrupted experience.
🎁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