Deserialization of Untrusted Data in Microsoft Dynamics 365 - CVE-2026-65815
Published: August 13, 2026
Vulnerability identifier: #VU142245
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-2026-65815
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in Microsoft Dynamics 365 On-Premises. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Microsoft Dynamics 365
How to mitigate CVE-2026-65815
Install updates from vendor's website.
Microsoft Dynamics 365 - update to 9.1.0047.0006