CVE-2025-70820
Received Received - Intake

Absolute Path Traversal in Zettlab D6 Ultra

Publication date: 2026-09-13

Last updated on: 2026-09-13

Assigner: MITRE

Description
Zettlab D6 Ultra before 1.7.0 allows absolute path traversal to reach folders other than the personal folder.

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Meta Information

Published
2026-09-13
Last Modified
2026-09-13
Generated
2026-09-14
AI Q&A
2026-09-13
EPSS Evaluated
N/A
NVD
CVE-2025-70820
EUVD
EUVD-2025-210899

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
zettlab d6_ultra to 1.7.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-36 The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory.

Attack-Flow Graph

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Executive Summary

This vulnerability is a path traversal flaw in Zettlab D6 Ultra before version 1.7.0. It allows an attacker to access folders outside the intended personal folder by manipulating file paths in the web UI's endpoint.

Detection Guidance

Check the Zettlab D6 Ultra firmware version. If it is below 1.7.0, the device is likely vulnerable. Inspect web UI requests to the /zettos/main/file/v1/list endpoint for path traversal attempts, such as accessing /etc/passwd or /etc/shadow.

Impact Analysis

An attacker could exploit this to access sensitive system files like /etc/passwd or /etc/shadow, potentially gaining unauthorized access to the device or extracting confidential information.

Mitigation Strategies

Update the Zettlab D6 Ultra firmware to version 1.7.0 or later immediately. Disable or restrict access to the /zettos/main/file/v1/list endpoint if possible. Monitor network traffic for suspicious requests targeting sensitive files.

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