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CVE-2025-52861: qnap systems inc. viostor Path Traversal

CVSS: 7.0v4.0HighDeferred
Published 29-08-2025Last modified 29-08-2025
Open JSON

Vulnerability summary

CVE-2025-52861 is a high (CVSS 7.0) Path Traversal vulnerability in qnap systems inc. viostor. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.3% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v4.0 (CVE.org)
EPSS score
0.65%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 29-08-2025
    PublishedVulnerability first disclosed.
  2. 29-08-2025
    Last modifiedVulnerability information updated.

Description

A path traversal vulnerability has been reported to affect VioStor. If a remote attacker gains an administrator account, they can then exploit the vulnerability to read the contents of unexpected files or system data. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.65%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

+0.03 pp

From 0.62% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.65%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Qnap systems inc.1 product
  • viostor≥ 5.1.0, < 5.1.6 build 20250621

1 vendor · 1 product

References

1 links