Intel

CVE-2026-69804

sharepoint_server: Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-2026-69804)

highEPSS 0.5%

Affected

  • microsoft/sharepoint_server lt *..16.0.20326.20090

Description

Time-of-check time-of-use (toctou) race condition in Microsoft Office SharePoint allows an authorized attacker to execute code 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
7.5
Source: nvd-v3
EPSS percentile
41.6 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
high
Priority score
81.00
Exploit maturity
no public PoC known
CVSS v3
7.5
EPSS score
0.5 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-09-08 17:13 UTC
CWE
CWE-367

Weakness classes (CWE)

  • CWE-367Base

    Time-of-check Time-of-use (TOCTOU) Race Condition

    The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

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

  1. Initial Analysis2026-09-09 17:13 UTC· nvd@nist.gov
    • 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-2026-69804 Types: Patch, Vendor Advisory
  2. CVE Modified2026-09-09 10:20 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-69804","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI… → {"id":"CVE-2026-69804","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  3. CVE Modified2026-09-09 04:19 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-69804","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  4. New CVE Received2026-09-08 18:19 UTC· secure@microsoft.com
    • Description: Time-of-check time-of-use (toctou) race condition in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
    • CVSS V3.1: AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    • CWE: CWE-367
    • Affected: New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/69xxx/CVE-2026-69804.json">CVE-2026-69804</a>