Widely used enterprise software with unauthenticated RCE via SQLi; could disrupt operations.
CVE-2026-21643
Unauthenticated SQL injection in Fortinet FortiClient EMS 7.4.4 enables remote code execution.
Is CVE-2026-21643 being exploited?
Yes. CVE-2026-21643 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-21643?
CVE-2026-21643 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-21643?
Yes. A fix has been recorded for CVE-2026-21643. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21643 affect?
CVE-2026-21643 affects Fortinet FortiClient EMS 7.4.4. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21643?
Patch when available; implement network hardening and monitoring.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can execute arbitrary commands on EMS via crafted HTTP requests, risking full server compromise.
Patch when possible
- affected7.4.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.