Page generated: 11 Nov 2026, 01:27 UTC
CVE-2021-31956
Windows NTFS Elevation of Privilege Vulnerability
CVSS 7.8 (HIGH) KEV: KNOWN CATALOG
Attention and evidence
HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.3/10
General review priority; not probability
Evidence confidence: Exploitation recorded
Sources: 10 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
Qualys
Press · 22 Feb 2022, 08:00 · Managing CISA Known Exploited Vulnerabilities with Qualys VMDR - Qualys
www.gendigital.com
Press · 12 Jan 2022, 08:00 · Exploit Kits vs. Google Chrome - www.gendigital.com
Computerworld
Press · 11 Jun 2021, 07:00 · 6 zero-days make this a ‘Patch Now’ Patch Tuesday - Computerworld
The Hacker News
Press · 09 Jun 2021, 07:00 · Update Your Windows Computers to Patch 6 New In-the-Wild Zero-Day Bugs - The Hacker News
BleepingComputer
Press · 08 Jun 2021, 07:00 · Windows 10 targeted by PuzzleMaker hackers using Chrome zero-days - BleepingComputer
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 8.3 (2026-11-02 15:12). The curve appears once the score changes.
Public exploit evidence
2
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 22.3%
- 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 13:58:26.907878+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
22 Feb 2022, 08:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
2 repositories