CVE-2026-32201: Microsoft SharePoint Enterprise Server 2016 · Improper Input Validation
Affects Microsoft SharePoint Enterprise Server 2016Source CVE Database V5
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
- 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:CExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 14 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: evidence found.
Listed in CISA KEV the same day as disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by Microsoft Corporation
, 34 days before disclosure
CVE published
on cve.org
, t = 0
In Threat Radar
record ingested
, 34 minutes after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed
, the same day as disclosure
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
| Product | Affected | Fixed in |
|---|---|---|
| MicrosoftMicrosoft SharePoint Enterprise Server 2016 | Affected
| Fixed in
|
| MicrosoftMicrosoft SharePoint Server 2019 | Affected
| Fixed in
|
| MicrosoftMicrosoft SharePoint Server Subscription Edition | Affected
| Fixed in
|
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.