Medium [CVE-2026-59836] Missed certificate verification in AD Connector communication with FortiClient EMS
This medium-severity Fortinet advisory covers CVE-2026-59836.
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Summary
CVSSv3 Score:
6.7
An Improper Certificate Validation vulnerability [CWE-295] in FortiClient EMS may allow a remote unauthenticated attacker to impersonate an AD Connector via a valid API Key.
Revised on 2026-07-14 00:00:00
- FortiClientEMS 7.4: 7.4.3 through 7.4.5
- FortiClientEMS 7.4: 7.4.0 through 7.4.1
- FortiClientEMS 7.2: 7.2 all versions
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
- FortiClientEMS 7.4: 7.4.6
- FortiClientEMS 7.2: migrate to a fixed release
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Mitigation checklist
- Upgrade per the Affected/Solution table: FortiClientEMS 7.4: 7.4.6; FortiClientEMS 7.2: migrate to a fixed release.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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