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CVE-2026-59838: fortisiem vulnerability
CVE-2026-59838: medium vulnerability affecting fortisiem. Check CVSS, KEV status, business impact and recommended administrator actions.
- CVSS
- 5.9 MEDIUM
- EPSS
- 3.99%
- Known exploited
- not in KEV
- Product
- fortisiem
What is known
A improper neutralization of script-related html tags in a web page (basic xss) vulnerability in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.2.0 through 7.2.6, FortiSIEM 7.1 all versions, FortiSIEM 7.0 all versions, FortiSIEM 6.7 all versions, FortiSIEM 6.6 all versions, FortiSIEM 6.5 all versions, FortiSIEM 6.4 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>
Business impact
Successful exploitation of CVE-2026-59838, a medium vulnerability (CVSS 5.9) affecting fortisiem, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration.
Recommended administrator action
Confirm whether fortisiem is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.