How severe is CVE-2026-88164?

CVE-2026-88164 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2026-88164?

Affected package information for CVE-2026-88164 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2026-88164?

No fixed release is recorded for CVE-2026-88164 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

How do I detect CVE-2026-88164 in my code and dependencies?

Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

How do I mitigate CVE-2026-88164 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2026-88164 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-88164 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What type of vulnerability is CVE-2026-88164?

CVE-2026-88164 is classified as CWE-862 (CWE-862). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-88164 published, and has it been updated?

CVE-2026-88164 was published on October 14, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

Not in CISA KEV

HIGH severity

CVE-2026-88164 — Microsoft

HIGH

CVE-2026-88164 is a high-severity (CVSS 8.8) CWE-862 vulnerability. No vendor fix is recorded yet; mitigation options are listed below.

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Published

Oct 14, 2026

Updated

Oct 14, 2026

Affected

—

Patched

—

Exploits

None indexed

Exploitation data as of Oct 14, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Detection & mitigation playbook

Vulnerability

Detect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-88164 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

O3 Security · Impact-Aware SCA

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CVE-2026-88164 — Microsoft

Description

Detection & mitigation playbook

Detect

Remediation status

Mitigate without a patch

Frequently Asked Questions

Is CVE-2026-88164 in your dependencies?