CVE-2021-23758
Ajax.NET Professional — Ajax.NET Professional Deserialization of Untrusted Data Vulnerability
What EVULNABLE says
EVULNABLE Risk · priority
89/100
Immediate
Intelligence coverage 75/90 — no pre-patch disclosure data
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 | 9.8 | NVD |
| FIRST EPSS | 0.836 (99.67th pctl) | FIRST |
| Actively exploited | Confirmed | CISA KEV |
| Ransomware campaign use | Unknown or none | CISA KEV |
| CISA remediation deadline | 2026-09-09 — CISA deadline in 6 days | CISA KEV |
What CISA says to do
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.