CVE-2026-20949

EUVD-2026-2145
Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
microsoftCNA
7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Base Score
CVSS 3.x
EPSS Score
Percentile: 2%
Affected Products (NVD)
VendorProductVersion
microsoft365_apps
-
microsoft365_apps
-
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20949