App denial of service via path traversal
Published Feb 4, 2026 · Updated Feb 4, 2026
Path traversal in Moo Chan Song Office Reader 4.5.7 allows local users to interrupt the app by filling its internal storage. The file-import path in joa.zipper.editor.Main trusts a content provider's _display_name value and writes supplied content to the resulting path without confining it to the app's intended directory. A malicious Android app can launch ViewOfficeActivity with a crafted content URI; after the victim opens that app, repeated oversized writes exhaust storage or memory and stop Office Reader from operating.
Summary
What happened
Path traversal in Moo Chan Song Office Reader 4.5.7 allows local users to interrupt the app by filling its internal storage. The file-import path in joa.zipper.editor.Main trusts a content provider's _display_name value and writes supplied content to the resulting path without confining it to the app's intended directory. A malicious Android app can launch ViewOfficeActivity with a crafted content URI; after the victim opens that app, repeated oversized writes exhaust storage or memory and stop Office Reader from operating.
The record
- CVE
- CVE-2025-69620
- Published
- Feb 4, 2026
- Updated
- Feb 4, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-22, T1499
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Feb 4, 2026CVE publishedPublication date reported by the CVE source.
- Feb 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Office Reader path traversal proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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