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Fortinet unearths another critical bug as SSO accounts borked post-patch

ID: 9503a08c-9065-599c-8171-4b528ba31c3b

STIX ID: report--9503a08c-9065-599c-8171-4b528ba31c3b

Feed Name: The Register (Security)

Threat Score
85/100

Date Published: 2026-01-28

Date Updated: 2026-04-26

Author: Connor Jones

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A critical authentication-bypass vulnerability (CVE-2026-24858, CVSS 9.4) in Fortinet's FortiCloud SSO was observed exploited in the wild by two malicious FortiCloud accounts, enabling cross-account administrative logins against FortiAnalyzer, FortiManager, FortiOS and FortiProxy; Fortinet has disabled FortiCloud SSO for vulnerable versions while patches are developed and continues investigations into FortiWeb and FortiSwitch Manager exposure.

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