Fortinet security advisory (AV26-351) – Update 2

Cybersecurity alert from the Canadian Centre for Cyber Security

Serial number: AV26-351
Date: April 14, 2026
Updated: July 16, 2026

On April 14, 2026, Fortinet published security advisories to address vulnerabilities in multiple products. Included were critical updates for the following:

  • FortiSandbox 4.4 – versions 4.4.0 to 4.4.8
  • FortiSandbox 5.0 – versions 5.0.0 to 5.0.5
  • FortiAnalyzer Cloud 7.6 – versions 7.6.2 to 7.6.4
  • FortiManager Cloud 7.6 – versions 7.6.2 to 7.6.4
  • FortiDDoS-F 7.2 – versions 7.2.1 to 7.2.2

Update 1

Open-source reporting indicates that CVE-2026-39813, CVE-2026-39808, and CVE-2026-25089 have been exploited.

Update 2

On July 16, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-39808 to their Known Exploited Vulnerabilities (KEV) Database.

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.



Courtesy of Canadian Centre for Cyber Security

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