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Page generated: 11 Nov 2026, 05:56 UTC

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CVE-2021-28310

Win32k Elevation of Privilege Vulnerability

CVSS 7.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

8.2/10

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: 8.40%: +0.04

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

Sources: 12 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

Hackread

Press · 03 Nov 2025, 08:00 · New Dante Spyware Linked to Rebranded Hacking Team, Now Memento Labs - Hackread

Cisco Talos Blog

Press · 11 May 2022, 07:00 · Bitter APT adds Bangladesh to their targets - Cisco Talos Blog

Qualys

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

Securelist

Press · 30 Nov 2021, 08:00 · APT annual review 2021 - Securelist

Securelist

Press · 12 Aug 2021, 07:00 · IT threat evolution in Q2 2021. PC statistics - Securelist

See all 12 source documents

TechTarget

Press · 29 Jul 2021, 07:00 · Kaspersky tracks Windows zero days to ‘Moses’ exploit author - TechTarget

Securelist

Press · 29 Jul 2021, 07:00 · APT trends report Q2 2021 - Securelist

CrowdStrike

Press · 10 Jun 2021, 07:00 · June 2021 Patch Tuesday: Updates and Analysis - CrowdStrike

TechTarget

Press · 14 Apr 2021, 07:00 · Exchange Server bugs continue to bite on April Patch Tuesday - TechTarget

BleepingComputer

Press · 13 Apr 2021, 07:00 · Microsoft April 2021 Patch Tuesday fixes 108 flaws, 5 zero-days - BleepingComputer

Securelist

Press · 13 Apr 2021, 07:00 · Zero-day vulnerability in Desktop Window Manager (CVE-2021-28310) used in the wild - Securelist

mcpmag.com

Press · 13 Apr 2021, 07:00 · Microsoft's April Patch Rollout the Biggest of 2021 So Far -- Microsoft Certified Professional Magazine Online - mcpmag.com

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 8.2 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

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 8.4%
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 13:58:25.853394+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

First press mention

13 Apr 2021, 07:00

Published

13 Apr 2021, 19:32

Added to the CISA KEV catalog

03 Nov 2021, 00:00

Latest press mention

03 Nov 2025, 08:00

Score calculated

05 Nov 2026, 13:58