CVE-2026-40360

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2026-05-12

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• microsoft:365_apps
• microsoft:excel
• microsoft:office
• microsoft:office_long_term_servicing_channel
• microsoft:office_online_server

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40360

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