Intel

CVE-2026-69690

sharepoint_server: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CVE-2026-69690)

mediumEPSS 0.4%

Affected

  • microsoft/sharepoint_server lt *..16.0.20326.20090

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Source: BSI CSAFBSI WID PortalNVD (NIST)cvelistv5Microsoft Security Update Guide

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

microsoftsharepoint_server
16.0.20326.20090fixed from 16.0.20326.20090

Metrics

XIEM Effective CVSS
5.4
Source: nvd-v3
EPSS percentile
32.2 %
Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
—
Show all metrics
Severity
medium
Priority score
60.97
Exploit maturity
no public PoC known
CVSS v3
4.6
EPSS score
0.4 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-09-08 17:13 UTC
CWE
CWE-79

Weakness classes (CWE)

  • CWE-79Base

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

    The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-09-09 19:17 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-69690","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  2. Initial Analysis2026-09-09 17:15 UTC· nvd@nist.gov
    • CVSS V3.1: AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    • CPE Configuration: OR *cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* versions up to (excluding) 16.0.20326.20090
    • Reference Type: Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69690 Types: Patch, Vendor Advisory
  3. New CVE Received2026-09-08 18:19 UTC· secure@microsoft.com
    • Description: Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
    • CVSS V3.1: AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
    • CWE: CWE-79
    • Affected: New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/69xxx/CVE-2026-69690.json">CVE-2026-69690</a>