Is this vulnerability remotely exploitable over the network?

Yes, but only through authenticated access. An attacker must interact with Modoboa's management interface or APIs and have sufficient privileges to control domain names that are later processed by `exec_cmd()`.

What level of access does an attacker need to exploit this issue?

Exploitation requires an authenticated Reseller or SuperAdmin account, or compromise of such an account. Regular end users without domain management privileges are not in a direct position to exploit the flaw.

What is the safest general fix pattern for developers?

The robust pattern is to remove `shell=True` and pass arguments as a list to subprocess calls, combined with strict validation of domain names against a well-defined DNS-compatible pattern. Where possible, replace shell commands with direct library calls that encapsulate the required system functionality.

Severity:

HIGH RISK

(7.2)

OS Command Injection (CWE-78) via Domain Name Handling in Modoboa exec_cmd()

CVE-2026-27602

Published:

Mar 25, 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:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution with Application Privileges

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution with Application Privileges

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

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OS Command Injection (CWE-78) via Domain Name Handling in Modoboa exec_cmd()

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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