CVE-2025-29897

Stack-based Buffer Overflow in qsyncsrv.cgi

Published Oct 15, 2026 CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Description
A buffer copy without checking size of input vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes.

We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.4 and later

Remediation

Vendor Solution

We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 and later

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Qnap Systems
Qnap Systems qsync Central
Vendors & Products Qnap Systems
Qnap Systems qsync Central
Type Values Removed Values Added
Description A buffer copy without checking size of input vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 and later
Title Stack-based Buffer Overflow in qsyncsrv.cgi
Weaknesses CWE-120
CWE-121
References
Metrics cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
qnap
Published
Updated
Oct 15, 2026, 6:38 PM
Reserved
Mar 12, 2025, 8:51 AM
Status
Awaiting Analysis
Published
Oct 15, 2026, 7:17 AM
Modified
Oct 19, 2026, 10:10 PM