Tencent HunyuanDiT merge Deserialization of Untrusted Data Remote Code Execution Vulnerability

December 1st, 2025
ZDI-25-1028 ZDI-CAN-27190

CVE ID

CVE-2025-13712

CVSS Score

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

Affected Vendors

Tencent

Affected Products

HunyuanDiT

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Tencent HunyuanDiT. 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 merge endpoint. 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 root.

Additional Details

Tencent has issued an update to correct this vulnerability. More details can be found at:
https://github.com/Tencent-Hunyuan/HunyuanDiT/commit/d2cb9cde5c9dc6a6c01735dcb92fe7699ddf6bc5

Disclosure Timeline

  • 2025-05-22 - Vulnerability reported to vendor
  • 2025-12-01 - Coordinated public release of advisory
  • 2025-12-01 - Advisory Updated

Credit

Peter Girnus (@gothburz) of Trend Zero Day Initiative

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