Qsync Central
CVE-2025-30276
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. |
| Exploit ScenarioDerived | A remote attacker could exploit this vulnerability to compromise the affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 12, 2026
An out-of-bounds write vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify or corrupt memory. [CVSS 8.8 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-787 (Out-of-bounds Write). Affects Qsync Central. An out-of-bounds write vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify or corrupt memory.
We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later
Know when Qsync Central gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
An out-of-bounds write vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify or corrupt memory.
We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later
Executive ViewAI
A high-severity vulnerability in Qsync Central allows authenticated attackers to corrupt system memory and potentially compromise data integrity or system availability. Organizations using Qsync Central are at immediate risk if user account credentials are compromised, requiring urgent containment measures until a patch is available.
Enable multi-factor authentication on all Qsync Central user accounts; implement network segmentation and firewall rules to restrict Qsync Central access to authorized networks only; deploy endpoint detection and response (EDR) monitoring on systems running Qsync Central; disable unused Qsync Central features if possible; maintain application-level audit logging for all Qsync Central activities; consider temporarily disabling Qsync Central for non-critical use cases until patch availability is confirmed.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Affected Products (CPE)CVE.org
More in Qsync Central
View allSQL injection vulnerability in Qsync Central that allows authenticated remote attackers to execute arbitrary code or com
SQL injection in QNAP Qsync Central 5.0.0 (all builds prior to 5.0.0.2) allows a remote attacker who already holds a val
SQL injection in QNAP Qsync Central versions 5.0.0 through below 5.0.0.2 lets a remote attacker who already holds a vali
An improper certificate validation vulnerability has been reported to affect Qsync Central. Rated high severity (CVSS 8.
An improper certificate validation vulnerability has been reported to affect Qsync Central. Rated high severity (CVSS 8.
A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th
A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th
A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th
A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th
Format string vulnerability in QNAP Qsync Central that allows authenticated remote attackers to read sensitive data or m
A use of externally-controlled format string vulnerability has been reported to affect Qsync Central. If a remote attack
A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th
GitHub PoC
Exploit-DB