Page generated: 09 Nov 2026, 11:23 UTC
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CVE-2021-42287

Active Directory Domain Services Elevation of Privilege Vulnerability

CVSS 7.5 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.5/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.5: +1.12
  • Fresh EPSS: 77.17%: +0.39

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

GBHackers News
Press · 10 Sep 2026, 07:00 · Hackers Deploy Hundreds of AI Agents to Compromise 440 PaperCut Servers - GBHackers News
Cyber Press
Press · 10 Sep 2026, 07:00 · Hackers Deploy Hundreds of AI Agents to Exploit PaperCut Flaws and Compromise 440 Servers - Cyber Press
CyberSecurityNews
Press · 09 Sep 2026, 07:00 · Hackers Use Hundreds of AI Agents to Exploit PaperCut Flaws and Compromise 440 Servers Worldwide - CyberSecurityNews
SOC Prime
Press · 02 Sep 2026, 07:00 · CVE-2026-81578: Exploited PaperCut Authentication Bypass Chains to Pre-Auth RCE - SOC Prime
Mishcon de Reya LLP
Press · 11 Mar 2025, 07:00 · Leaked ransomware chat logs offer unique insights into attack methodologies - Mishcon de Reya LLP
See all 11 source documents
The Hacker News
Press · 10 Sep 2024, 07:00 · CosmicBeetle Deploys Custom ScRansom Ransomware, Partnering with RansomHub - The Hacker News
The Record from Recorded Future News
Press · 03 Nov 2022, 07:00 · FIN7 cybercrime cartel tied to Black Basta ransomware operation: report - The Record from Recorded Future News
Palo Alto Networks
Press · 10 Jan 2022, 08:00 · Detecting the Kerberos noPac Vulnerabilities with Cortex XDR™ - Palo Alto Networks
The Hacker News
Press · 22 Dec 2021, 08:00 · Active Directory Bugs Could Let hackers Take Over Windows Domain Controllers - The Hacker News
SOC Prime
Press · 13 Dec 2021, 08:00 · Detect CVE-2021-42287, CVE-2021-42278 Exploitation Сhain - SOC Prime
The Stack
Press · 10 Nov 2021, 08:00 · These Active Directory updates will break unpatched domain controllers - The Stack

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 8.5 (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 77.2%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, low privileges, no 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 13:58:31.036516+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
10 Nov 2021, 00:47
First press mention
10 Nov 2021, 08:00
Added to the CISA KEV catalog
11 Apr 2022, 00:00
Latest press mention
10 Sep 2026, 07:00
Score calculated
05 Nov 2026, 13:58