CVE-2026-62910: Microsoft Exchange Server Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.2)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Aug

Released

2026-08-11

Description

Improper control of resource identifiers ('resource injection') in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

FAQ

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Affected Products (4)

Server Software

• Microsoft Exchange Server Subscription Edition RTM

ESU

• Microsoft Exchange Server 2016 Cumulative Update 23
• Microsoft Exchange Server 2019 Cumulative Update 15
• Microsoft Exchange Server 2019 Cumulative Update 14

Security Updates (1)

• 5121573

Acknowledgments

<a href="https://www.linkedin.com/in/yannic-r-28b446158/">Yannic R&#246;cken</a> with <a href="https://indeno.at/">Indeno GmbH</a>

Revision History

• 2026-08-11: Information published.