To comprehensively address this vulnerability Windows 11 Version 26H1 for ARM64-based Systems and Windows 11 Version 26H1 for64-based Systems have been added to the Security Updates table. Microsoft recommend updating to the June 2026 version of your Windows operating systems.

To comprehensively address this vulnerability Windows 11 Version 26H1 for ARM64-based Systems and Windows 11 Version 26H1 for64-based Systems have been added to the Security Updates table. Microsoft recommend updating to the June 2026 version of your Windows operating systems.

To comprehensively address this vulnerability Windows 11 Version 26H1 for ARM64-based Systems and Windows 11 Version 26H1 for64-based Systems have been added to the Security Updates table. Microsoft recommend updating to the June 2026 version of your Windows operating systems.

To comprehensively address this vulnerability Windows 11 Version 26H1 for ARM64-based Systems and Windows 11 Version 26H1 for64-based Systems have been added to the Security Updates table. Microsoft recommend updating to the June 2026 version of your Windows operating systems.

To comprehensively address this vulnerability Windows 11 Version 26H1 for ARM64-based Systems and Windows 11 Version 26H1 for64-based Systems have been added to the Security Updates table. Microsoft recommend updating to the June 2026 version of your Windows operating systems.

Added links to June 2026 Exchange Server security updates. Microsoft recommends installing this updates as soon as possible.

Added links to June 2026 Windows security updates. Microsoft recommends installing this updates as soon as possible.

Added Microsoft Excel for Android, Microsoft Word for Android, Microsoft Loop for Android, Microsoft PowerPoint for Android and Microsoft OneNote for Android softwares to the Security Updates table. Customers that are running supported version of these products are encouraged to update to the indicated versions to be protected from this vulnerability.

Added Office softwares to the Security Updates table. Customers that are running supported versions of Office are encouraged to update to the indicated versions to be protected from this vulnerability.

To comprehensively address the vulnerability identified by CVE-2020-17103, Microsoft recommends installing the June 2026 updates for your Windows operating systems.

Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privileges locally.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Project Server allows an authorized attacker to perform spoofing over a network.

No cwe for this issue in Windows Kernel allows an unauthorized attacker to elevate privileges locally.

Information published.

Information published.

Trust boundary violation in Windows Attestation allows an authorized attacker to elevate privileges locally.

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Improper authorization in Microsoft PowerToys allows an authorized attacker to elevate privileges locally.

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.