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VulnerabilityPublished Updated

CVE-2026-32201: Microsoft SharePoint Enterprise Server 2016 · Improper Input Validation

Affects Microsoft SharePoint Enterprise Server 2016Source CVE Database V5

0
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Exploited in the wild · KEV due 28 Apr 2026 · public exploit available · 43% EPSS : upgrade to 16.0.5548.1003 now.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
KEV deadline
 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
EPSS
43.3% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 16.0.5548.1003, 16.0.10417.20114, 16.0.19725.20210
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 14 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: evidence found.

    Listed in CISA KEV the same day as disclosure

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by Microsoft Corporation

    , 34 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. In Threat Radar

    record ingested

    , 34 minutes after disclosure

  4. , the same day as disclosure

  5. KEV remediation due

    US federal deadline

    , 14 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 24 Oct 2026.

What to do

Upgrade Microsoft SharePoint to 16.0.5548.1003 (Enterprise Server 2016) or 16.0.10417.20114 (Server 2019) or 16.0.19725.20210 (Server Subscription Edition).

Affected software

ProductAffectedFixed in
MicrosoftMicrosoft SharePoint Enterprise Server 2016Affected
  • >=16.0.0 <16.0.5548.1003
Fixed in
  • 16.0.5548.1003
MicrosoftMicrosoft SharePoint Server 2019Affected
  • >=16.0.0 <16.0.10417.20114
Fixed in
  • 16.0.10417.20114
MicrosoftMicrosoft SharePoint Server Subscription EditionAffected
  • >=16.0.0 <16.0.19725.20210
Fixed in
  • 16.0.19725.20210

Description

CVE-2026-32201 is a medium severity vulnerability in Microsoft SharePoint Enterprise Server 2016 caused by improper input validation. This flaw allows an unauthorized attacker to perform spoofing attacks over a network. The vulnerability affects multiple versions prior to specific fixed releases. Microsoft has issued official fixes for the affected versions. Exploitation in the wild is confirmed, and the vulnerability is listed in the CISA KEV catalog.

References

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