Heap-based buffer overflow in Microsoft Exchange Server - CVE-2026-62913
Published: August 11, 2026
Vulnerability identifier: #VU141475
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-62913
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to heap-based buffer overflow in an affected Exchange service when handling specially crafted requests over the network. A remote user can send a specially crafted request to execute arbitrary code.
Affected software
Microsoft Exchange Server
How to mitigate CVE-2026-62913
Install security update from vendor's website.
Microsoft Exchange Server - addressed in versions 15.01.2507.072, 15.02.1544.044, 15.02.1748.049, 15.02.2562.046