CVE-2026-40368

high

Published 2026-05-12 · Modified 2026-05-13

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

8.0

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.0

Description

<p>Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.</p>

Predictions

Exploit likelihood

87%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
windows		affected

Application impact

Vendor	Product	Versions	Fixed
microsoft	sharepoint_server	`{"endExcluding":"16.0.19725.20280"}`	`16.0.19725.20280`
microsoft	sharepoint_server	`2016`
microsoft	sharepoint_server	`2019`

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368

CWEs

CWE-502

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.