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Data Master CVE-2026-3179

HIGH
Path Traversal (CWE-22)
2026-02-25 security@asustor.com
8.1
CVSS 3.1 · NVD
View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Attacker positions as MITM on FTP connection
  2. Delivery
    Craft malicious filename with path traversal sequences
  3. Exploit
    ADM client parses unsanitized FTP directory listing
  4. Execution
    Files written outside backup directory
  5. Persist
    Arbitrary file overwrite achieved
  6. Impact
    Privilege escalation or RCE

Vulnerability Assessment

Weakness
CWE
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.

Exploitation Conditions

ADM FTP Backup feature enabled and actively receiving directory listings from attacker-controlled or MITM-intercepted FTP server. Affected versions: ADM 4.1.0–4.3.3.ROF1 and ADM 5.0.0–5.1.2.RE51. Requires network-level attack position (MITM) or compromised FTP server.

Impact

CVSS 8.1 (HIGH). Attack vector: Network. Complexity: High. Privileges required: None. User interaction: None. Exploitable via remote/network.

Exploit ScenarioDerived

A remote attacker could exploit this vulnerability to overwrite arbitrary files on the system and potentially achieve privilege escala.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Arbitrary file write vulnerability in Data Master ADM versions 4.1.0-4.3.3.ROF1 and 5.0.0-5.1.2.RE51 allows remote or man-in-the-middle attackers to bypass filename sanitization in FTP backup operations and place malicious files outside the intended directory. An attacker can exploit this path traversal flaw to overwrite critical system files and potentially execute code with elevated privileges. No patch is currently available, and exploitation requires moderate attack complexity but no user interaction.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 21:55 CVSS 8.1

The FTP Backup on the ADM does not properly sanitize filenames received from the FTP server when parsing directory listings. A malicious server or MITM attacker can craft filenames containing path traversal sequences, causing the client to write files outside the intended backup directory. [CVSS 8.1 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.

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.

Technical ContextAI · show details

Classified as CWE-22 (Path Traversal). Affects Data Master. The FTP Backup on the ADM does not properly sanitize filenames received from the FTP server when parsing directory listings. A malicious server or MITM attacker can craft filenames containing path traversal sequences, causing the client to write files outside the intended backup directory. A path traversal vulnerability may allow an attacker to overwrite arbitrary files on the system and potentially achieve privilege escalation or remote code execution. Affected products and versions include: fr

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

The FTP Backup on the ADM does not properly sanitize filenames received from the FTP server when parsing directory listings. A malicious server or MITM attacker can craft filenames containing path traversal sequences, causing the client to write files outside the intended backup directory. A path traversal vulnerability may allow an attacker to overwrite arbitrary files on the system and potentially achieve privilege escalation or remote code execution. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.2.RE51.

Executive ViewAI

Why It Matters

A critical vulnerability in FTP Backup functionality on ADM systems allows attackers to write malicious files outside intended directories, potentially compromising system integrity and enabling lateral movement. This affects any organization using ADM with FTP backup enabled and requires immediate mitigation to prevent unauthorized file placement and potential system compromise.

Business Impact: High
Compensating Controls

Disable FTP Backup feature immediately if not operationally critical; restrict FTP server connections to allowlisted, trusted internal servers only; implement network segmentation to isolate ADM systems from untrusted networks; deploy file integrity monitoring on ADM system directories to detect unauthorized file writes; use SFTP or encrypted alternatives instead of unencrypted FTP; monitor ADM logs for path traversal indicators and unusual file creation patterns.

Threat Intelligence Overview

EPSS Score
0.5%
Top 36% exploitable
Data Quality
3 sources
Confidence: Low

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 HIGH
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

40
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +40
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

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

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)CVE.org

cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:*
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