PT-2026-47976 · Microsoft · Exchange Server 2016 Cumulative Update 23+3

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45504

Mitre

CVSS v3.1

8.8

High

Base vector

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

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-45504

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://nvd.nist.gov/vuln/detail/CVE-2026-45504 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504 · Vendor Advisory