File Station CVE-2025-62856

MEDIUM

Path Traversal (CWE-22)

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

Path Traversal Qnap File Station

4.4

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-22 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V5 - File Handling Path canonicalization, traversal prevention MITRE ATT&CK 2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 4.4 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: High. User interaction: None. Exploitation requires authentication. Exploitable via local access.
Exploit ScenarioDerived	An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

A path traversal vulnerability has been reported to affect File Station 5. If a local attacker gains an administrator account, they can then exploit the vulnerability to read the contents of unexpected files or system data. [CVSS 4.4 MEDIUM]

RemediationAI

Monitor vendor advisories for a patch. Validate and sanitize file path inputs. Use allowlists.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Technical ContextAI · show details

Classified as CWE-22 (Path Traversal). Affects File Station. A path traversal vulnerability has been reported to affect File Station 5. If a local 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: File Station 5 5.5.6.5190 and later

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 4.4 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionCVE.org

A path traversal vulnerability has been reported to affect File Station 5. If a local 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: File Station 5 5.5.6.5190 and later

Executive ViewAI

Why It Matters

Organizations using A path traversal vulnerability should be aware of moderate risk from CVE-2025-62856, a path traversal vulnerability rated CVSS 4.4. This could allow unauthorized file access. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low

Compensating Controls

Apply vendor patch. If patching is delayed: restrict file access via WAF, implement allowlists.

Threat Intelligence Overview

EPSS Score

0.0%

Top 91% exploitable

Data Quality

3 sources

Confidence: Low

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

No

Human Impact

Low

Priority Score

22

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +22

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Path Traversal HIGH

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

Affected Products (CPE)CVE.org

cpe:2.3:a:qnap:file_station:*:*:*:*:*:*:*:*

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Same weakness CWE-22 – Path Traversal

View all

CVE-2019-3396 CRITICAL POC

CVE-2019-19781 CRITICAL POC

CVE-2020-5902 CRITICAL POC

CVE-2021-21972 CRITICAL POC

CVE-2021-40444 HIGH POC

CVE-2022-41352 CRITICAL POC

CVE-2021-27065 HIGH POC

CVE-2019-11510 CRITICAL POC

Same technique Path Traversal

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CVE-2018-20250 HIGH POC

CVE-2022-37042 CRITICAL POC

CVE-2025-64446 CRITICAL POC

References

Advisories & patches

ADVISORY https://www.qnap.com/en/security-advisory/qsa-26-03

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