OS Command Injection Vulnerability in ZhongBangKeJi CRMEB Custom Scheduled Task Feature
CVE-2026-85040

5.1MEDIUM

Key Information:

Vendor

Zhongbangkeji

Status
Crmeb
Vendor
CVE Published:
3 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-85040?

A security weakness has been detected in the CRMEB system from ZhongBangKeJi, specifically affecting versions prior to 6.0.0. This vulnerability arises from the handling of the eval function in the /adminapi/system/crontab/save file within the Custom Scheduled Task feature. By manipulating the customCode argument, an attacker could execute arbitrary OS commands remotely. Despite the vendor describing this behavior as intended for debugging, the inadequate safeguards, such as the isSafePhpCode blacklist, do not effectively neutralize the potential for remote code execution, leaving systems vulnerable to exploitation.

Affected Version(s)

CRMEB 6.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-85040 - Proof of Concept

References

https://vuldb.com/vuln/398300
vdb-entrytechnical-description
https://vuldb.com/vuln/398300/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-85040
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

xiaohai12138 (VulDB User)
.