CVE-2026-55008
Microsoft Exchange Server Spoofing Vulnerability
At a glance Severity CRITICAL 9.6 EPSS EPSS 0.86 % · percentile 58 (2026-10-27) State PUBLISHED Published 2026-07-14 Updated 2026-10-28 Assigner microsoft NVD status Analyzed Description 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.
Scores Version Score Vector Scored by CVSS 3.1 CRITICAL 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C microsoft CVSS 3.1 CRITICAL 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H NVD · secure@microsoft.com (Secondary)
Weaknesses (CWE)
European references
CERT-FR advisories
Affected configurations (NVD CPE) cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_14:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_15:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server_subscription_edition:*:*:*:*:*:*:*:* < 15.02.2562.045Affected products
References
Sources
