What is the CVSS score of CVE-2025-30269?

CVE-2025-30269 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Qsync Central are affected by CVE-2025-30269?

CVE-2025-30269 is a format string vulnerability in Qsync Central that allows authenticated attackers to access sensitive data or manipulate system memory.

How to fix or mitigate CVE-2025-30269?

Within 24 hours: Identify all Qsync Central deployments and document active user accounts with access. Implement network segmentation to restrict Qsync Central access to trusted networks only. Within 7 days: Audit recent user account activities and access logs for suspicious behavior; consider disabling non-essential Qsync Central instances if not business-critical. Within 30 days: Monitor vendor communications for patch availability; establish a deployment plan for immediate patching once released; conduct user access review and enforce strong authentication policies.

Qsync Central CVE-2025-30269

HIGH

Use of Externally-Controlled Format String (CWE-134)

2026-02-11 security@qnapsecurity.com.tw

Code Injection Qsync Central

8.1

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

CVE Published

Feb 11, 2026 - 13:15 nvd

HIGH 8.1

DescriptionNVD

A use of externally-controlled format string vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to obtain secret data or modify memory.

We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

AnalysisAI

Technical ContextAI

Classified as CWE-134 (Use of Externally-Controlled Format String). Affects Qsync Central. A use of externally-controlled format string vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to obtain secret data or modify memory.

We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

CVE-2025-30269 vulnerability details – vuln.today

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