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CVE-2026-63516

MediumCVSS 6.5/10Last modified Aug 12, 2026

Description

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Microsoft SharePoint Enterprise Server 2016	>= 16.0.0, < 16.0.5565.1001
Microsoft	Microsoft SharePoint Server 2019	>= 16.0.0, < 16.0.10417.20198
Microsoft	Microsoft SharePoint Server Subscription Edition	>= 16.0.0, < 16.0.19725.20522

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63516Patch, Vendor Advisory

Timeline

Published: Aug 11, 2026
Last modified: Aug 12, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-635175.5Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.CVE-2026-635187.8Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.CVE-2026-635197.8Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.CVE-2026-63522.7GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that CVE-2026-635208.1Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.CVE-2026-635215.5Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.CVE-2026-635227.8Incorrect permission assignment for critical resource in Azure SQL Database allows an authorized attacker to elevate privileges locally.CVE-2026-635236.1Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker t CVE-2026-635245.5Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.CVE-2026-635257.8Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code locally.CVE-2026-635267.8Stack-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.CVE-2026-635277.8Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2026-63516: Medium severity, CVSS 6.5 | Vulnix