CVE-2026-40368
published 2026-05-12CVE-2026-40368: Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
PriorityP352high8CVSS 3.1
AVNACLPRLUIRSUCHIHAH
EPSS
1.98%
78.3th percentile
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_sharepoint_enterprise_server_2016 | >= 16.0.0 < 16.0.5552.1002 | 16.0.5552.1002 |
| microsoft | microsoft_sharepoint_server_2019 | >= 16.0.0 < 16.0.10417.20128 | 16.0.10417.20128 |
| microsoft | microsoft_sharepoint_server_subscription_edition | >= 16.0.0 < 16.0.19725.20280 | 16.0.19725.20280 |
| microsoft | sharepoint_server | < 16.0.19725.20280 | 16.0.19725.20280 |
| microsoft | sharepoint_server | — | — |
| microsoft | sharepoint_server | — | — |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Microsoft SharePoint Server 2.0/16.0.5548.1003 deserialization
vuldb·2026-05-12
CVE-2026-40368 [CRITICAL] Microsoft SharePoint Server 2.0/16.0.5548.1003 deserialization
A vulnerability was found in Microsoft SharePoint Server 2.0/16.0.5548.1003. It has been rated as critical. Impacted is an unknown function. This manipulation causes deserialization.
This vulnerability is handled as CVE-2026-40368. The attack can be initiated remotely. There is not any exploit available.
Upgrading the affected component is advised.
GHSA
GHSA-x3r3-x95v-wx99: Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network
ghsa_unreviewed·2026-05-12
CVE-2026-40368 [HIGH] CWE-502 GHSA-x3r3-x95v-wx99: Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
No detection rules found.
No public exploits indexed.
2026-05-12
Published