PT-2026-48029 · Microsoft · Exchange Server 2016 Cumulative Update 23+3

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-47631

NVD

CVSS v3.1

8.1

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-47631

Affected Products

Exchange Server 2016 Cumulative Update 23

Exchange Server 2019 Cumulative Update 14

Exchange Server 2019 Cumulative Update 15

Exchange Server Subscription Edition Rtm

References · 2

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47631 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-47631 · Security Note