CVE-2026-55054

MEDIUM CVSS 6.5 View on NVD ↗

Description

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

CVSS Vector

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

Affected Products

apple/macos microsoft/365_apps microsoft/excel microsoft/office microsoft/office_2021 microsoft/office_2024 microsoft/office_365 microsoft/office_online_server

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55054

Published: Jul 14, 2026 18:18 UTC Modified: Jul 15, 2026 13:49 UTC