CVE-2026-55054

EUVD-2026-44197
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 57.65%
Affected Products (NVD)
VendorProductVersion
microsoft365_apps
-
microsoft365_apps
-
microsoftoffice_2021
𝑥
< 16.111.26071215
microsoftoffice_2021
-
microsoftoffice_2021
-
microsoftoffice_2024
𝑥
< 16.111.26071215
microsoftoffice_2024
-
microsoftoffice_2024
-
microsoftoffice_online_server
𝑥
< 16.0.10417.20175
microsoftoffice_365
𝑥
< 16.111.26071215
microsoft365_apps
𝑥
< 2606
microsoftoffice
𝑥
< 2606
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55054