CVE-2026-45504 HIGH

CVE-2026-45504: Microsoft Exchange Server Elevation of Privilege Vulnerability

Vendor Microsoft
Product Microsoft Exchange Server 2016 Cumulative Update 23
Weakness CWE-918 · SSRF
Published June 9, 2026
Last update June 15, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

June 9, 2026 CVE published
June 15, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2026-31804 Tautulli: Unauthenticated pms_image_proxy endpoint proxies arbitrary HTTP requests through the Plex Media Server CVE-2026-41272 Flowise: SSRF Protection Bypass (TOCTOU & Default Insecure) CVE-2022-2339 Server-Side Request Forgery (SSRF) in nocodb/nocodb CVE-2026-25528 LangSmith Client SDK Affected by Server-Side Request Forgery via Tracing Header Injection CVE-2025-15104 Nu Html Checker (validator.nu) - Restriction bypass vulnerability allowing local SSRF