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CVE-2026-21643: Fortinet FortiClient EMS

EPSS93.8%No. 395 of 1739 in KEV
CVE year2026listed the same year
Same vendor in KEV31
Same product3
FieldValue
VendorFortinet
ProductFortiClient EMS
NameFortinet FortiClient EMS SQL Injection Vulnerability
Added to KEV2026-04-13
US federal due date2026-04-16
Ransomware useUnknown
CWECWE-89

CISA description

Fortinet FortiClient EMS contains a SQL injection vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.

Other entries for this product

CVEVendor / productAddedEPSSRansomware
CVE-2026-35616Fortinet FortiClient EMS2026-04-069.0%Unknown
CVE-2023-48788Fortinet FortiClient EMS2024-03-2598.4%Known

NVD — CVE-2026-21643

Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page

A Fortinet FortiClient EMS vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2026-04-13.