What is CVE-2026-88210?

CVE-2026-88210 is a high-severity vulnerability in Microsoft 365 Apps For Enterprise, classified under CWE-807. CVSS score: 7.8/10. Published 2026-10-13.

How severe is CVE-2026-88210?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft 365 Apps For Enterprise

CVE-2026-88210

Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft 365 Apps For Enterprise
Microsoft Office 365 For Mac
Microsoft Office Ltsc 2024
Microsoft Office Ltsc For Mac 2021
Microsoft Office Ltsc For Mac 2024

Weakness classification (CWE)

CWE-807

References

Microsoft Office Word Security Feature Bypass Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-88210?: CVE-2026-88210 is a high-severity vulnerability in Microsoft 365 Apps For Enterprise, classified under CWE-807. CVSS score: 7.8/10. Published 2026-10-13.
How severe is CVE-2026-88210?: High severity. CVSS v3 base score is 7.8 out of 10.