Advisory Details

July 31st, 2025

(Pwn2Own) QNAP TS-464 Active Directory Authentication Bypass Vulnerability

ZDI-25-742
ZDI-CAN-25587

CVE ID
CVSS SCORE 8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS QNAP
AFFECTED PRODUCTS TS-464
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of QNAP TS-464 devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the Active Directory integration. The issue results from the improper implementation of an authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the system.

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
  • 2024-12-19 - Vulnerability reported to vendor
  • 2025-07-31 - Coordinated public release of advisory
  • 2025-07-31 - Advisory Updated
CREDIT Corentin "@OnlyTheDuck" BAYET from REverse Tactics
BACK TO ADVISORIES