What EVULNABLE says
CVSS base score 5.9, and Microsoft Exploitability Index: Exploitation Less Likely.
Scheduled Maintenance
CVE-2026-62899
Microsoft — .NET Security Feature Bypass 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 | 5.9 | — |
| FIRST EPSS | 0.007 (51.1st 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-2026-62899 is one of the entries ranked on the priority feed and in this month's Microsoft release.