CVE-2026-85040
Received Received - Intake

Command Injection in ZhongBangKeJi CRMEB

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: VulDB

Description
A weakness has been identified in ZhongBangKeJi CRMEB up to 6.0.0. Affected by this vulnerability is the function eval of the file /adminapi/system/crontab/save of the component Custom Scheduled Task Feature. This manipulation of the argument customCode causes os command injection. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. Vendor documents this as deliberate debug-only behavior. But isSafePhpCode blacklist offers no real RCE containment.

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Meta Information

Published
2026-09-03
Last Modified
2026-09-03
Generated
2026-09-03
AI Q&A
2026-09-03
EPSS Evaluated
N/A
NVD
CVE-2026-85040
EUVD
EUVD-2026-70314

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
zhongbangkeji crmeb to 6.0.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This vulnerability is an OS command injection flaw in ZhongBangKeJi CRMEB up to version 6.0.0. It exists in the Custom Scheduled Task feature, specifically in the eval function of the file /adminapi/system/crontab/save. The vulnerability allows attackers to inject malicious code via the customCode argument, which is then executed remotely. The vendor considers this debug-only behavior, but the blacklist for safe PHP code does not effectively prevent remote code execution.

Detection Guidance

Check for unauthorized POST requests to /adminapi/system/crontab/save with customCode parameters containing suspicious PHP code. Inspect logs for eval() function calls in SystemCrontab.php, SystemCrontabServices.php, or CrontabRunServices.php. Look for unexpected scheduled tasks with malicious payloads in the admin panel.

Impact Analysis

An attacker with high-privilege backend access can exploit this to execute arbitrary PHP code on the server. This could lead to full system compromise, data theft, or unauthorized actions. The exploit is publicly available and can be triggered remotely without requiring user interaction.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection requirements and HIPAA's security rules. Organizations using affected CRMEB versions may face compliance breaches, legal penalties, and reputational damage due to potential data breaches.

Mitigation Strategies

Immediately restrict access to the CRMEB admin panel to trusted users only. Remove or disable the custom scheduled task feature if not essential. Update to the latest version of CRMEB if a patch is available. Monitor for suspicious eval() usage in logs and block known malicious payload patterns.

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