PT-2026-47977 · Microsoft · Exchange Server 2016 Cumulative Update 23+3

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45583

NVD

CVSS v3.1

7.5

High

Base vector

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

Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

Fix

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2026-45583

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-2026-45583 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45583 · Vendor Advisory