VulnerabilityAnalyzed
CVE-2026-63520
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
HIGH 8.1EPSS 2.89%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.89% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- microsoft/sharepoint server
- Source
- secure@microsoft.com
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63520Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.