What is CVE-2026-97740?

CVE-2026-97740 is a medium-severity vulnerability in Microsoft 365 Apps For Enterprise, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 6.5/10. Published 2026-10-13.

How severe is CVE-2026-97740?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft 365 Apps For Enterprise

CVE-2026-97740

Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

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

Weakness classification (CWE)

CWE-497 — Exposure of Sensitive System Information to an Unauthorized Control Sphere

References

Microsoft Office Excel Information Disclosure Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-97740?: CVE-2026-97740 is a medium-severity vulnerability in Microsoft 365 Apps For Enterprise, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 6.5/10. Published 2026-10-13.
How severe is CVE-2026-97740?: Medium severity. CVSS v3 base score is 6.5 out of 10.