CVE-2026-32201

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Description

Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

From the Tenable Blog

April 2026 Microsoft Patch Tuesday | Tenable®

Published: 2026-04-14

Microsoft patched 163 CVEs in April including two zero-day vulnerabilities in SharePoint and Microsoft Defender. CVE-2026-32201 was exploited in the wild.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32201

https://www.bleepingcomputer.com/news/security/over-1-300-microsoft-sharepoint-servers-vulnerable-to-ongoing-attacks/

https://www.theregister.com/2026/04/15/excel_exploit/

https://www.malwarebytes.com/blog/news/2026/04/april-patch-tuesday-fixes-two-zero-days-including-one-under-active-attack

https://www.infosecurity-magazine.com/news/microsoft-two-zerodays-april-patch/

https://thehackernews.com/2026/04/microsoft-issues-patches-for-sharepoint.html

https://thehackernews.com/2026/04/april-patch-tuesday-fixes-critical.html

https://securityaffairs.com/190852/hacking/u-s-cisa-adds-microsoft-sharepoint-server-and-microsoft-office-excel-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://securityaffairs.com/190831/security/microsoft-patch-tuesday-for-april-2026-fixed-actively-exploited-sharepoint-zero-day.html

https://www.theregister.com/2026/04/14/microsofts_massive_patch_tuesday/

https://www.securityweek.com/microsoft-patches-exploited-sharepoint-zero-day-and-160-other-vulnerabilities/

https://www.cisa.gov/news-events/alerts/2026/04/14/cisa-adds-two-known-exploited-vulnerabilities-catalog

https://cyberscoop.com/microsoft-patch-tuesday-april-2026/

https://www.tenable.com/blog/microsofts-april-2026-patch-tuesday-addresses-163-cves-cve-2026-32201

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-32201

Details

Source: Mitre, NVD

Published: 2026-04-14

Updated: 2026-04-14

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N