CVE-2025-52856
VioStor Improper Authentication Vulnerability
Description
An improper authentication vulnerability has been reported to affect VioStor. If a remote attacker, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later
INFO
Published Date :
Aug. 29, 2025, 6:15 p.m.
Last Modified :
Aug. 29, 2025, 6:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-52856
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update VioStor to version 5.1.6 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-52856.
| URL | Resource |
|---|---|
| https://www.qnap.com/en/security-advisory/qsa-25-29 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-52856 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-52856
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-52856 vulnerability anywhere in the article.
-
Daily CyberSecurity
QNAP Patches Critical Flaw (CVE-2025-52856) with CVSS 9.3
QNAP has released a security advisory addressing multiple vulnerabilities affecting the QVR firmware on legacy VioStor NVR devices. The flaws include an improper authentication bug and a path traversa ... Read more
-
Daily CyberSecurity
A Critical Zero-Click WhatsApp Flaw, CVE-2025-55177, Was Exploited in Zero-Day Attacks
Meta’s WhatsApp Security Team has patched a zero-day flaw (CVE-2025-55177) in WhatsApp for iOS (prior to v2.25.21.73), WhatsApp Business for iOS (prior to v2.25.21.78), and WhatsApp for Mac (prior to ... Read more
-
Daily CyberSecurity
CRITICAL Zero-Day CVE-2025-57819 in FreePBX Is Under Active Attack (CVSS 10.0)
The Sangoma FreePBX Security Team has issued a critical advisory for a newly discovered vulnerability in its popular open-source telephony platform. Tracked as CVE-2025-57819 with a maximum CVSSv4 sco ... Read more
The following table lists the changes that have been made to the
CVE-2025-52856 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 29, 2025
Action Type Old Value New Value Added Description An improper authentication vulnerability has been reported to affect VioStor. If a remote attacker, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-287 Added Reference https://www.qnap.com/en/security-advisory/qsa-25-29