CVE-2026-69804: Time-of-check time-of-use (toctou) race condition in Microsoft Office SharePoint allows an authorized attacker

Q: How do I fix CVE-2026-69804?

sharepoint server: upgrade to 16.0.20326.20090. Exact commands for each OS are on this page.

Q: Is CVE-2026-69804 being exploited?

CVE-2026-69804 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-69804 affect?

CVE-2026-69804 affects sharepoint server. Severity is high (CVSS 7.5). Time-of-check time-of-use (toctou) race condition in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Q: How urgent is CVE-2026-69804?

Priority 42/100. High severity; On your watchlist

This month

HIGH 7.5WATCHLISTUPGRADE

CVE-2026-69804 is a high-severity flaw (CVSS 7.5) affecting sharepoint server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Time-of-check time-of-use (toctou) race condition in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-367
Published	2026-09-08
Last modified	2026-09-09

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-09-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-08 18:19 UTCPublished CVE record published
2026-09-09 17:13 UTCUpdated Record last modified

microsoft sharepoint server UPGRADE

Affected: < 16.0.20326.20090

Fixed in: 16.0.20326.20090

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sharepoint-server || rpm -q sharepoint-server || sharepoint-server --version

2. UPGRADE to 16.0.20326.20090 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sharepoint-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sharepoint-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-69804?

sharepoint server: upgrade to 16.0.20326.20090. Exact commands for each OS are on this page.

Is CVE-2026-69804 being exploited?

CVE-2026-69804 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-69804 affect?

CVE-2026-69804 affects sharepoint server. Severity is high (CVSS 7.5). Time-of-check time-of-use (toctou) race condition in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

How urgent is CVE-2026-69804?

Priority 42/100. High severity; On your watchlist

Software pages

SharePoint vulnerabilities · Microsoft Office vulnerabilities

Related CVEs

CVE-2026-32201 MEDIUM 6.5 EXPLOITED UPGRADE Microsoft SharePoint Server Improper Input Validation Vulnerability
CVE-2026-20945 MEDIUM 4.6 UPGRADE Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Share
CVE-2026-33112 HIGH 8.8 UPGRADE Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code
CVE-2026-33110 HIGH 8.8 UPGRADE Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code
CVE-2026-35439 HIGH 8.8 UPGRADE Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code

References

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