SANS Stormcast Monday, January 26th, 2026: FortiOS SSO Vuln Updates; Outlook OOB Update; VMware vCenter Exploited
Update: 2026-01-26
Description
Analysis of Single Sign-On Abuse on FortiOS
Fortinet released an advisory. FortiOS devices are vulnerable if configured with any SAML integration, not just FortiCloud
https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios
Outlook OOB Update
Microsoft released a non-security OOB Update for Outlook, fixing an issue introduced with this months security patches.
https://support.microsoft.com/en-us/topic/january-24-2026-kb5078127-os-builds-26200-7628-and-26100-7628-out-of-band-cf5777f6-bb4e-4adb-b9cd-2b64df577491
VMware vCenter Server Vulnerabilities Exploited (CVE-2024-37079, CVE-2024-37080, CVE-2024-37081)
A VMWare vCenter vulnerability patched last June is now actively exploited.
https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/24453
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