What EVULNABLE says
CVSS base score 8.1, and Microsoft Exploitability Index: Exploitation Less Likely.
Scheduled Maintenance
CVE-2026-66802
Microsoft — Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability
Patch Tuesday
The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.
The evidence behind it
| Measure | Value | Source |
|---|---|---|
| CVSS base score | 8.1 | — |
| FIRST EPSS | 0.004 (29.1st pctl) | FIRST |
| Actively exploited | Not confirmed | Patch Tuesday |
The primary records
This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.
Where this sits
CVE-2026-66802 is one of the entries ranked on the priority feed and in this month's Microsoft release.