CVE-2026-100208
Microsoft Office Outlook Remote Code Execution vulnerability
MSRC advisory September 25, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-100208
- CWE
- CWE-190
- Affected products
- Microsoft Office Outlook Remote Code Execution · Microsoft Microsoft Office Outlook Remote Code Execution · Microsoft
What happened
Information published. This CVE was addressed by updates that were released in August 2026, but the CVE was inadvertently omitted from the August 2026 Security Updates. This is an informational change only. Customers who have already installed the August 2026 updates do not need to take any further action.
What it means for your business
Microsoft Office Outlook Remote Code Execution vulnerability (CVE-2026-100208) was added to Microsoft’s security update guidance. Information published. This CVE was addressed by updates that were released in August 2026, but the CVE was inadvertently omitted from the August 2026 Security Updates. This is an informational change only. Customers who have already installed the August 2026 updates do not ne… If you need help checking exposure, call (864) 335-9223.
CVSS score
7.5 (High)
Sources
Related briefs
Microsoft SharePoint Code Injection Vulnerability
Microsoft SharePoint is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-65660). Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network. CISA remediation due date: 2026-09-28. If you need help checking exposure, call (864) 335-9223.
Out of bounds write in V8 in Microsoft Edge vulnerability
Out of bounds write in V8 in Microsoft Edge vulnerability (CVE-2026-4450) was added to Microsoft’s security update guidance. Information published. If you need help checking exposure, call (864) 335-9223.
Microsoft Office Information Disclosure vulnerability
Microsoft Office Information Disclosure vulnerability (CVE-2026-100206) was added to Microsoft’s security update guidance. Information published. This CVE was addressed by updates that were released in July 2026, but the CVE was inadvertently omitted from the July 2026 Security Updates. This is an informational change only. Customers who have already installed the July 2026 updates do not need to… If you need help checking exposure, call (864) 335-9223.
Type Confusion in V8 in Microsoft Edge vulnerability
Type Confusion in V8 in Microsoft Edge vulnerability (CVE-2025-2135) was added to Microsoft’s security update guidance. Information published. If you need help checking exposure, call (864) 335-9223.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.