VulnRadar

Data against noise.

Page generated: 09 Nov 2026, 08:10 UTC

← Dashboard

CVE-2021-40449

Win32k Elevation of Privilege Vulnerability

CVSS 7.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

8.6/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 7.8: +1.17
Fresh EPSS: 81.94%: +0.41

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)

0/100

Press, 30 days (60%)

0/100

Grounded branding (15%)

0/100

HYPE TOTAL0/100

Sources and documents

Kaspersky

Press · 02 Feb 2026, 08:00 · How does cyberthreat attribution help in practice? - Kaspersky

Securelist

Press · 18 Oct 2023, 07:00 · Updated MATA attacks industrial companies in Eastern Europe - Securelist

Qualys

Press · 22 Feb 2022, 08:00 · Managing CISA Known Exploited Vulnerabilities with Qualys VMDR - Qualys

Rapid7

Press · 12 Nov 2021, 08:00 · Metasploit Wrap-Up: Nov. 12, 2021 - Rapid7

Check Point Research

Press · 18 Oct 2021, 07:00 · 18th October – Threat Intelligence Report - Check Point Research

See all 11 source documents

TechTarget

Press · 13 Oct 2021, 07:00 · Microsoft squashes Windows zero-day on October Patch Tuesday - TechTarget

BleepingComputer

Press · 12 Oct 2021, 07:00 · Microsoft October 2021 Patch Tuesday fixes 4 zero-days, 71 flaws - BleepingComputer

Securelist

Press · 12 Oct 2021, 07:00 · MysterySnail attacks with Windows zero-day - Securelist

Cisco Talos Blog

Press · 12 Oct 2021, 07:00 · Microsoft Patch Tuesday for Oct. 2021 — Snort rules and prominent vulnerabilities - Cisco Talos Blog

Krebs on Security

Press · 12 Oct 2021, 07:00 · Patch Tuesday, October 2021 Edition - Krebs on Security

Kaspersky

Press · 12 Oct 2021, 07:00 · CVE-2021-40449: Trojan delivery vulnerability - Kaspersky

Score evolution

● Hype ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.6 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

See 3 repos with metrics

Repository	Stars	Forks	Language	Updated
Kristal-g/CVE-2021-40449_poc	54	12	C	07 Nov 2021, 16:21
CppXL/cve-2021-40449-poc	1	1	C++	12 Nov 2021, 13:28
Joe1sn/CVE_2021_40449	1	0	C++	12 Jul 2026, 05:32

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence: Exploitation recorded
Priority basis: Recorded exploitation; CVSS 7.8; EPSS 81.9%
Attention, last 30 days: 0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential: local access, low privileges, no user interaction.
Observed activity: Exploitation recorded in CISA KEV.
Known scale: Not quantified.
Evidence confidence basis: Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:30.019134+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

First press mention

12 Oct 2021, 07:00

Published

13 Oct 2021, 00:26

Added to the CISA KEV catalog

17 Nov 2021, 00:00

Latest press mention

02 Feb 2026, 08:00

Score calculated

05 Nov 2026, 13:58

PoCs on GitHub

3 repositories