CVE-2026-21643

Fortinet — Fortinet FortiClient EMS SQL Injection Vulnerability

CISA KEV · in the CISA KEV catalog since 2026-04-13

What EVULNABLE says

EVULNABLE Risk · priority 88/100 Immediate Intelligence coverage 75/90 — no pre-patch disclosure data
ExigentOverdue by 5 monthsCISA KEVActively Exploited

Why it matters: Listed in the CISA KEV catalog, and an EPSS probability of 0.941.

Out-of-Band / Urgent Remediation

The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.

The evidence behind it

Published measurements for CVE-2026-21643
MeasureValueSource
CVSS base score 9.8 NVD
FIRST EPSS 0.941 (99.84th pctl) FIRST
Actively exploited Confirmed CISA KEV
Ransomware campaign use Unknown or none CISA KEV
CISA remediation deadline 2026-04-16 — Overdue by 5 months CISA KEV
Intelligence coverage 75/90 — no pre-patch disclosure data

What CISA says to do

This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.