Is this vulnerability remotely exploitable?

Exploitation depends on how Claude Code is used and integrated. An attacker must be able to influence the content or instructions within the Claude Code context window (for example, via shared snippets, malicious prompts, or integrations) so that the tool executes a crafted sequence of `cd` and write operations.

What level of access does an attacker need?

The attacker needs logical access to shape what Claude Code sees or executes—typically the ability to contribute text, commands, or code to the session. They do not need direct shell access, but they do rely on the tool executing filesystem-affecting operations on their behalf.

What is the safest general fix pattern for this type of issue?

The most robust fix is to centralize all file operations behind a strict policy layer that: - Always resolves and normalizes target paths. - Enforces allow/deny rules on the final resolved location. - Requires explicit user confirmation for protected directories, regardless of how the working directory was set or what prior commands were executed.

Severity:

CRITICAL RISK

(9.1)

Improper Input Validation (CWE-20) in Claude Code Directory Protection Logic

CVE-2026-25722

Published:

Feb 6, 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:

Improper Input Validation

CWE:

CWE-20;CWE-78

Impact:

Unauthorized File Creation and Modification in Protected Directories

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Input Validation

CWE:

CWE-20;CWE-78

Impact:

Unauthorized File Creation and Modification in Protected Directories

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Improper Input Validation (CWE-20) in Claude Code Directory Protection Logic

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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