CVE-2023-28771
Zyxel — Zyxel Multiple Firewalls OS Command Injection Vulnerability
What EVULNABLE says
EVULNABLE Risk · priority
87/100
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 | 0.993 (99.94th pctl) | FIRST |
| Actively exploited | Confirmed | CISA KEV |
| Ransomware campaign use | Unknown or none | CISA KEV |
| CISA remediation deadline | 2023-06-21 — Overdue by 3.2 years | 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.