CVE-2026-21527

EUVD-2026-7340
User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing 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:N/S:U/C:L/I:L/A:N
microsoftCNA
6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
Base Score
CVSS 3.x
EPSS Score
Percentile: 17%
Affected Products (NVD)
VendorProductVersion
microsoftexchange_server
𝑥
< 15.02.2562.037
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2507.66
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1748.43
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1544.39
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21527