Page generated: 10 Nov 2026, 17:00 UTC
CVE-2021-33742
Windows MSHTML Platform Remote Code Execution Vulnerability
CVSS 7.5 (HIGH) KEV: KNOWN CATALOG
Attention and evidence
HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.4/10
General review priority; not probability
Evidence confidence: Exploitation recorded
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
BleepingComputer
Press · 12 Nov 2021, 08:00 · Zero-day bug in all Windows versions gets free unofficial patch - BleepingComputer
Security Magazine
Press · 16 Jul 2021, 07:00 · Attackers exploit zero-day flaws in Chrome, Safari and Internet Explorer - Security Magazine
The Record from Recorded Future News
Press · 14 Jul 2021, 07:00 · Windows spyware and zero-days linked to prodigious Israeli hack-for-hire company - The Record from Recorded Future News
BleepingComputer
Press · 14 Jul 2021, 07:00 · Google: Russian SVR hackers targeted LinkedIn users with Safari zero-day - BleepingComputer
CrowdStrike
Press · 10 Jun 2021, 07:00 · June 2021 Patch Tuesday: Updates and Analysis - CrowdStrike
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 8.4 (2026-11-02 15:12). The curve appears once the score changes.
Public exploit evidence
0
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 7.5; EPSS 59.4%
- Attention, last 30 days
- 0 distinct story titles; 0 press documents; 0 publisher domains.
- Technical potential
- network access, no prior privileges, user interaction, additional attack conditions.
- Observed activity
- Exploitation recorded in CISA KEV.
- Known scale
- Not quantified.
- Evidence confidence basis
- Trusted exploitation confirmation
Score evaluated: 2026-11-05 13:58:27.921902+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z
Source event timeline
First press mention
08 Jun 2021, 07:00
Published
08 Jun 2021, 22:46
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
12 Nov 2021, 08:00
Score calculated
05 Nov 2026, 13:58