How broadly exploitable is this vulnerability?

Exploitability depends on how widely the file import feature is exposed. If standard user accounts or external tenants can access the import mechanism, the vulnerability may be exploitable by many parties. If it is restricted to highly trusted internal users, the practical risk surface is narrower, though still serious.

What level of access does an attacker need?

An attacker generally needs the ability to interact with the file import mechanism—often through a normal authenticated user account or an API token. Direct system-level access is not required; the vulnerability abuses the application's own file handling logic.

What is the safest general fix pattern?

The most robust fix is to strictly isolate upload/import storage from application and system directories, enforce canonical path checks to keep all writes inside that storage area, and remove any reliance on client-supplied directory paths. Combining these changes with least-privilege filesystem permissions significantly reduces risk.

Severity:

CRITICAL RISK

(9.8)

Arbitrary File Overwrite via Path Traversal (CWE-22) in Zefiro Cloud File Import

CVE-2026-30286

Published:

Mar 31, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Path Traversal / Arbitrary File Overwrite

CWE:

CWE-22

Impact:

Remote Code Execution and Information Exposure

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal / Arbitrary File Overwrite

CWE:

CWE-22

Impact:

Remote Code Execution and Information Exposure

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Arbitrary File Overwrite via Path Traversal (CWE-22) in Zefiro Cloud File Import

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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