CVE-2025-30278
Published: 29 August 2025
Summary
CVE-2025-30278 is a high-severity Improper Certificate Validation (CWE-295) vulnerability in Qnap Qsync Central. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 30.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SC-17 (Public Key Infrastructure Certificates) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mandates establishment of requirements for PKI certificate validation, comprehensively addressing the improper certificate validation vulnerability in CVE-2025-30278.
Requires timely identification, testing, and deployment of patches to remediate flaws like the certificate validation issue fixed in Qsync Central 4.5.0.7.
Provides vulnerability scanning to identify and prioritize remediation of specific issues like CVE-2025-30278 prior to exploitation by remote attackers with user accounts.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper cert validation (CWE-295) in public-facing Qsync service enables remote exploitation by authenticated users for full compromise; maps to public app exploitation and trust control subversion.
NVD Description
An improper certificate validation vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in…
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the following version: Qsync Central 4.5.0.7 ( 2025/04/23 ) and later
Deeper analysisAI
CVE-2025-30278 is an improper certificate validation vulnerability (CWE-295) affecting Qsync Central. Published on 2025-08-29, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact across confidentiality, integrity, and availability.
A remote attacker who first gains a user account on the affected system can exploit the vulnerability over the network with low complexity and no user interaction required. Successful exploitation allows the attacker to compromise the overall security of the system.
QNAP has fixed the vulnerability in Qsync Central version 4.5.0.7, released on 2025/04/23, and all later versions. Additional details are available in the vendor's security advisory at https://www.qnap.com/en/security-advisory/qsa-25-22.
Details
- CWE(s)