(Pwn2Own) QNAP QHora-322 do_fetch Improper Certificate Validation Vulnerability

July 31st, 2025
ZDI-25-737 ZDI-CAN-25530

CVE ID

CVSS Score

4.3 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Vendors

QNAP

Affected Products

QHora-322

Vulnerability Details

This vulnerability allows network-adjacent attackers to compromise transport security on affected installations of QNAP QHora-322 routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the do_fetch method. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of admin.

Additional Details

QNAP has issued an update to correct this vulnerability. More details can be found at:
https://www.qnap.com/en-us/security-advisories

Disclosure Timeline

  • 2024-12-02 - Vulnerability reported to vendor
  • 2025-07-31 - Coordinated public release of advisory
  • 2025-07-31 - Advisory Updated

Credit

Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam)

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