Risk Letters

Exploited vulnerability

CVE-2026-21643

TLP:CLEAR

Fortinet FortiClient EMS SQL Injection Vulnerability

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.

Facts

  • Vendor: Fortinet
  • Product: FortiClient EMS
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 97.7 %
  • On CISA's Known Exploited Vulnerabilities list since: 13 April 2026
  • First known exploitation: 13 April 2026
  • CISA's deadline for US federal agencies: 16 April 2026
  • Weakness: CWE-89
  • First seen by Risk Letters: 13 April 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD