CVE-2026-81391
Microsoft Excel Information Disclosure vulnerability
MSRC advisory September 8, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-81391
- Affected products
- Microsoft Excel Information Disclosure · Microsoft Microsoft Excel Information Disclosure · Microsoft
What happened
Microsoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not need to take any action. See the [Release Notes](https://go.microsoft.com/fwlink/p/?linkid=831049) for more information and download links.
What it means for your business
Microsoft Excel Information Disclosure vulnerability (CVE-2026-81391) was added to Microsoft’s security update guidance. Microsoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not… If you need help checking exposure, call (864) 335-9223.
EPSS probability
0.38%
Sources
Related briefs
Microsoft Edge (Chromium-based) Elevation of Privilege vulnerability
Microsoft Edge (Chromium-based) Elevation of Privilege vulnerability (CVE-2026-88097) was added to Microsoft’s security update guidance. <p>Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges locally.</p> If you need help checking exposure, call (864) 335-9223.
Out of bounds memory access in V8 in Microsoft Edge vulnerability
Out of bounds memory access in V8 in Microsoft Edge vulnerability (CVE-2026-0899) was added to Microsoft’s security update guidance. Information published. If you need help checking exposure, call (864) 335-9223.
Azure Cosmos DB Elevation of Privilege vulnerability
Azure Cosmos DB Elevation of Privilege vulnerability (CVE-2026-87701) was added to Microsoft’s security update guidance. <p>Improper neutralization of special elements in output used by a downstream component ('injection') in Azure Cosmos DB allows an authorized attacker to elevate privileges over a network.</p> If you need help checking exposure, call (864) 335-9223.
Azure AI Foundry Elevation of Privilege vulnerability
Azure AI Foundry Elevation of Privilege vulnerability (CVE-2026-85917) was added to Microsoft’s security update guidance. <p>Server-side request forgery (ssrf) in Azure AI Foundry allows an unauthorized attacker to elevate privileges over a network.</p> 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.