Advisory Details

March 16th, 2026

(Pwn2Own) QNAP TS-453E Hyper Data Protector Plugin Hard-Coded Credentials Authentication Bypass Vulnerability

CVE ID	CVE-2025-59388
CVSS SCORE	6.3, AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
AFFECTED VENDORS	QNAP
AFFECTED PRODUCTS	TS-453E
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of QNAP TS-453E devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the configuration of Bareos by the Hyper Data Protector Plugin. The issue results from the use of hard-coded credentials. 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/security-advisory/qsa-25-48
DISCLOSURE TIMELINE	2025-11-18 - Vulnerability reported to vendor 2026-03-16 - Coordinated public release of advisory 2026-03-16 - Advisory Updated
CREDIT	Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam)

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