CVE-2026-55008

EUVD-2026-44026
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.6 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 57.45%
Affected Products (NVD)
VendorProductVersion
microsoftexchange_server
𝑥
< 15.02.2562.045
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2507.71
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1544.43
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.1748.48
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55008