# CVE-2026-85040: ZhongBangKeJi CRMEB remote code execution in custom scheduled tasks

Source: https://junglewise.ai/threats/cve-2026-85040-zhongbangkeji-crmeb-remote-code-execution-in-custom-scheduled  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-03. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-85040 · Severity: medium · CVSS 4.7 · Published 2026-09-03

CRMEB is a popular open-source e-commerce and CRM system. The custom scheduled task feature allows authenticated backend administrators to define code that runs on a timer. A weakness in input validation enables authenticated attackers to execute arbitrary code on the server by injecting malicious payloads into the customCode parameter, leading to complete system compromise.

Technologies: [ZhongBangKeJi CRMEB](https://junglewise.ai/threats/technologies/crmeb). Vendors: [ZhongBangKeJi](https://junglewise.ai/threats/vendors/zhongbangkeji).

## Quick answers

**Is CVE-2026-85040 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-85040 being exploited in the wild.

**How severe is CVE-2026-85040?** Medium severity, with a CVSS score of 4.7, published 3 September 2026.

**Which products and versions are affected?** ZhongBangKeJi CRMEB up to 6.0.0.

**Is there a fix for CVE-2026-85040?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-85040 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-85040?** Check whether you run ZhongBangKeJi CRMEB at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a remote code execution flaw in the custom scheduled task feature of CRMEB. An authenticated backend administrator can submit arbitrary PHP code via the customCode parameter to POST /adminapi/system/crontab/save. The application applies only a blacklist-based filter (isSafePhpCode) which is insufficient to prevent code injection. The code is then stored and executed later via eval() in CrontabRunServices.php when the scheduled task runs. Attack requires prior admin/backend authentication and access to the administrative interface. An attacker with backend access can execute arbitrary OS commands and PHP code with the privileges of the web server process. The vendor documented this as debug-only behavior but the weak blacklist provides no genuine RCE protection.

## Affected products

- ZhongBangKeJi CRMEB up to 6.0.0

## Timeline

- 2026-09-03: disclosed
- other: Exploit made publicly available

## References

- [https://github.com/xiaohai12138-1/cve/blob/main/CRMEB/CRMEB%20Backend%20custom%20%20scheduled%20task%20functionality%20%20RCE.md](https://github.com/xiaohai12138-1/cve/blob/main/CRMEB/CRMEB%20Backend%20custom%20%20scheduled%20task%20functionality%20%20RCE.md)
- [https://vuldb.com/cve/CVE-2026-85040](https://vuldb.com/cve/CVE-2026-85040)