CVE-2026-21643: listed in the CISA KEV catalog

CVE-2026-21643 · CVSS 9.8 CRITICAL · EPSS 94% · KEV 2026-04-13

An improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.4 may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.

Is CVE-2026-21643 exploited?

• Listed in the CISA KEV catalog on 2026-04-13.
• Federal remediation due 2026-04-16.
• Past that date by 121 days.
• EPSS puts exploitation in the next 30 days at 94%.
• Public exploit code: none found in monitored sources.
• Public detection rules exist.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

No patch identifier recorded here yet.

What PlainSec published about CVE-2026-21643

• Attackers Exploit Both Decade-Old and New Flaws in Federal Systems (2026-04-08)

Primary sources

• NVD record
• CISA KEV catalog
• Nuclei template

What this record does not say

• No affected package data.
• No patch identifier.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.