Unauthenticated SQL Injection RCE in Fortinet FortiClient EMS
CVE-2026-21643 is a critical SQL injection vulnerability in Fortinet FortiClient Enterprise Management Server (EMS). The provided content identifies the flaw as an improper neutralization of special elements used in an SQL command and states it affects the FortiClient EMS administrative interface, with multiple references specifically calling out version 7.4.4 and broader reporting indicating affected 7.4.x releases up to the fixed build. Technical analysis cited in the content attributes the issue to improper input validation in middleware handling of the HTTP Site header before database connection setup. According to that analysis, attacker-controlled Site header data is used to construct a PostgreSQL search_path value without sufficient sanitization, enabling pre-authentication SQL injection via crafted HTTP requests. Successful exploitation can lead to unauthorized code or command execution on the EMS server. The vulnerability has been reported as actively exploited in the wild and was added to CISA’s Known Exploited Vulnerabilities catalog.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
No valid public exploits. Mallory filtered out 3 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
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Recent activity
153 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A FortiClient EMS vulnerability mentioned as being under active exploitation during the same period as the FortiBleed campaign; no further technical details are provided in the content.
A critical SQL injection vulnerability in Fortinet FortiClient Enterprise Management Server (EMS) that was patched and later flagged as actively exploited.
An unauthenticated SQL injection vulnerability in FortiClient EMS 7.4.4 that was also exploited in the wild.
A critical vulnerability in FortiClient Enterprise Management Server that was later flagged as actively exploited.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.