CVE-2026-40357

HIGH
MEDIUM Priority: 0.15 BB Relevance: 68/100
Published: 2026-05-12 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: High
I: High
A: High

Description

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

Weakness Classification (1)

Affected Software (3)

VendorProductVersion
microsoft sharepoint_server < 16.0.19725.20280
microsoft sharepoint_server 2016
microsoft sharepoint_server 2019

References & Advisories (1)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

1.70%
Raw Score 0.016980
Percentile 77.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.01698
2026-10-28
0.01698

Intelligence Sources

nvd ref →