Advisory Details

July 31st, 2025

(Pwn2Own) QNAP QHora-322 qfirewall Improper Restriction of Communication Channel to Intended Endpoints Firewall Bypass Vulnerability

ZDI-25-749
ZDI-CAN-25596

CVE ID
CVSS SCORE 5.0, AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
AFFECTED VENDORS QNAP
AFFECTED PRODUCTS QHora-322
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to bypass firewall rules on affected installations of QNAP QHora-322 routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of firewall rules. The issue results from failing to bind LAN IP ranges to the LAN interfaces. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.
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 Alain Rodel, Benjamin Walny (Neodyme AG)
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