Microsoft Olive Deserialization of Untrusted Data Remote Code Execution Vulnerability

April 15th, 2026
ZDI-26-273 ZDI-CAN-28054

CVE ID

CVSS Score

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

Affected Vendors

Microsoft

Affected Products

Olive

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Olive. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of models. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current process.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://github.com/microsoft/Olive/pull/2389

Disclosure Timeline

  • 2025-12-23 - Vulnerability reported to vendor
  • 2026-04-15 - Coordinated public release of advisory
  • 2026-04-15 - Advisory Updated

Credit

Xingyu Wang

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