CVE-2026-45583
Microsoft Exchange Server Remote Code Execution vulnerability
MSRC advisory June 9, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-45583
- Affected products
- Microsoft Exchange Server Remote Code Execution · Microsoft Microsoft Exchange Server Remote Code Execution · Microsoft
What happened
Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
What it means for your business
Microsoft Exchange Server Remote Code Execution vulnerability (CVE-2026-45583) was added to Microsoft’s security update guidance. Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network. If you need help checking exposure, call (864) 335-9223.
Sources
Related briefs
Microsoft Exchange Server Remote Code Execution vulnerability
Microsoft Exchange Server Remote Code Execution vulnerability (CVE-2026-62913) was added to Microsoft’s security update guidance. Added acknowledgements. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Microsoft Excel Remote Code Execution vulnerability
Microsoft Excel Remote Code Execution vulnerability (CVE-2026-68801) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Microsoft Office Remote Code Execution vulnerability
Microsoft Office Remote Code Execution vulnerability (CVE-2026-64903) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Microsoft Office Information Disclosure vulnerability
Microsoft Office Information Disclosure vulnerability (CVE-2026-64899) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. 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.