CVE-2026-59841: Fortinet Supers override fails to properly override supervisor address
This Fortinet advisory covers CVE-2026-59841 in FortiSIEMWindowsAgent.
- CVE-2026-59841
Key facts
- Vendor rating
- High, CVSS 7.5
- CISA KEV
- Not listed (catalogue checked )
- Affected
- FortiSIEMWindowsAgent FortiSIEMWindowsAgent: 4.2 through 7.5 (vendor-listed versions)
- Fixed in
- FortiSIEMWindowsAgent 7.4: 7.4.2
- Advisory id
- FG-IR-26-155
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
CVSSv3 Score:
7.5
An Improper Restriction of Communication Channel to Intended Endpoints [CWE-923] vulnerability in FortiSIEM Windows Agent may allow an unauthorized attacker on the same local network to execute arbitrary code via spoofing the supervisors hostname when the Windows device is configured with the 'Supers Override' feature.
Revised on 2026-07-14 00:00:00
Affected product named by the advisory: FortiSIEMWindowsAgent.
Text from the source record.
- FortiSIEMWindowsAgent FortiSIEMWindowsAgent: 4.2 through 7.5 (vendor-listed versions)
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-59841
Upgrade to a fixed release named by Fortinet:
- FortiSIEMWindowsAgent 7.4: 7.4.2
Vendor guidance
- Upgrade per the Affected/Solution table: FortiSIEMWindowsAgent 7.4: 7.4.2.
Workarounds
- Enable Verify Host TLS/SSL certificate on FortiSIEM Windows agent installation
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