CVE-2026-45455
Microsoft Excel Information Disclosure vulnerability
MSRC advisory June 9, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-45455
- 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-2026-45455) 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.
Sources
Related briefs
Microsoft Excel Information Disclosure vulnerability
Microsoft Excel Information Disclosure vulnerability (CVE-2026-70328) was added to Microsoft’s security update guidance. Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. If you need help checking exposure, call (864) 335-9223.
Microsoft Excel Information Disclosure vulnerability
Microsoft Excel Information Disclosure vulnerability (CVE-2026-70327) was added to Microsoft’s security update guidance. Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. If you need help checking exposure, call (864) 335-9223.
Microsoft Excel Information Disclosure vulnerability
Microsoft Excel Information Disclosure vulnerability (CVE-2026-70318) was added to Microsoft’s security update guidance. Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally. If you need help checking exposure, call (864) 335-9223.
Microsoft Excel Information Disclosure vulnerability
Microsoft Excel Information Disclosure vulnerability (CVE-2026-68813) was added to Microsoft’s security update guidance. Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally. If you need help checking exposure, call (864) 335-9223.
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