Qsync Central PT Vulnerability (before 5.0.0.6/5.1.0.2/5.2.0.4)
CVE-2026-26243 Published on October 15, 2026
Arbitrary Folder Deletion in Qsync Central 5.0.0.5
A path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data.
We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.6 and later
Qsync Central 5.1.0.2 and later
Qsync Central 5.2.0.4 and later
Vulnerability Analysis
CVE-2026-26243 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-26243 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-26243
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Affected Versions
QNAP Systems Inc. Qsync Central:- Version 5.0.x and below 5.0.0.6 is affected.
- Version 5.1.x and below 5.1.0.2 is affected.
- Version 5.2.x and below 5.2.0.4 is affected.