CVE-2026-30286
Arbitrary File Overwrite in Funambol Zefiro Cloud Enables Code Execution
Publication date: 2026-03-31
Last updated on: 2026-04-03
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| funambol | zefiro | 32.0.2026011614 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-22 | The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-30286 is an arbitrary file overwrite vulnerability in Funambol, Inc.'s Zefiro Cloud app version 32.0.2026011614. The flaw exists in the file import process, specifically in the component com.funambol.a2a.share.ui.A2AReceiveShareActivity, where insufficient security validation allows an attacker to manipulate the filename and content of imported files.
By exploiting path traversal techniques, an attacker can overwrite critical internal files within the app's internal storage. This can lead to arbitrary code execution or exposure of sensitive information.
How can this vulnerability impact me? :
This vulnerability can have severe impacts including arbitrary code execution, which means an attacker could run malicious code within the app environment.
It can also lead to exposure of sensitive information stored within the app, denial of service by causing the app to malfunction or fail to launch, and privilege escalation allowing attackers to gain higher access rights.
The attack requires minimal user interaction and can be triggered automatically when the victim opens a malicious app.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
The vulnerability in Zefiro Cloud app allows arbitrary file overwrite via the file import process, exploiting path traversal to overwrite critical internal files. Detection involves monitoring for suspicious file import activities or unexpected modifications to internal app files.
Since the vulnerability exploits file import and path traversal, you can check for unusual file paths or recently modified files within the app's internal storage directories.
- On a rooted Android device or emulator, use commands like: - `adb shell ls -l /data/data/com.funambol.zefiro/files/` to list files and check for unexpected changes. - `adb shell find /data/data/com.funambol.zefiro/ -mtime -7` to find files modified in the last 7 days. - Monitor logs for suspicious activity related to file imports or crashes.
- Use Android's logcat to detect abnormal app behavior: `adb logcat | grep com.funambol.zefiro`.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting or disabling the file import functionality in the Zefiro Cloud app until a patch is available.
Avoid opening or importing files from untrusted sources to prevent exploitation of the path traversal vulnerability.
Monitor for updates or patches from Funambol, Inc. addressing this vulnerability and apply them promptly.
Consider limiting app permissions related to file access and storage to reduce the risk of arbitrary file overwrite.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability in Funambol, Inc. Zefiro Cloud allows attackers to overwrite critical internal files, potentially leading to arbitrary code execution or exposure of sensitive information.
Such exposure or unauthorized access to sensitive data could negatively impact compliance with data protection regulations like GDPR or HIPAA, which require safeguarding personal and sensitive information against unauthorized access or breaches.
However, the provided information does not explicitly detail the direct compliance implications or specific regulatory impacts.