8.7

CVE-2026-39993: qnap systems inc. download station Relative Path Traversal

CVSS: 8.7v4.0HighAwaiting analysis
Published 15-10-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-39993 is a high (CVSS 8.7) Relative Path Traversal vulnerability in qnap systems inc. download station. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.36%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-10-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

A relative path traversal vulnerability has been reported to affect Download Station. If a remote attacker gains a user 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: Download Station 5.10.2.313 and later Download Station 5.11.3.322 and later

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

15-10-202620-10-2026
EPSS score
0.36%

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

1 vendor · 1 product

References

1 links