CVE-2020-10189 in Desktop Central
Summary
by MITRE
Zoho ManageEngine Desktop Central before 10.0.474 allows remote code execution because of deserialization of untrusted data in getChartImage in the FileStorage class. This is related to the CewolfServlet and MDMLogUploaderServlet servlets.
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Analysis
by VulDB Data Team • 11/07/2025
The vulnerability identified as CVE-2020-10189 affects Zoho ManageEngine Desktop Central versions prior to 10.0.474, presenting a critical remote code execution risk through insecure deserialization practices. This flaw exists within the FileStorage class where the getChartImage method processes untrusted data without adequate validation or sanitization measures. The vulnerability manifests through two primary servlets namely CewolfServlet and MDMLogUploaderServlet which serve as attack vectors for malicious actors to exploit the deserialization weakness. The root cause aligns with CWE-502 which specifically addresses deserialization of untrusted data as a security weakness that can lead to arbitrary code execution when attackers can manipulate serialized objects.
The technical exploitation of this vulnerability occurs when remote attackers send specially crafted serialized data to the affected servlet endpoints. The CewolfServlet and MDMLogUploaderServlet components fail to properly validate incoming serialized objects, allowing attackers to inject malicious payloads that get deserialized and executed within the application context. This creates a pathway for attackers to execute arbitrary commands on the target system with the privileges of the application server. The vulnerability demonstrates characteristics consistent with attack patterns described in the ATT&CK framework under technique T1059.007 for command and scripting interpreter and T1203 for Exploitation for Client Execution, where the deserialization vulnerability serves as the initial exploitation vector.
The operational impact of this vulnerability is severe as it provides attackers with complete control over the affected Desktop Central server. Successful exploitation can result in data breaches, system compromise, lateral movement within the network, and potential escalation to other systems in the enterprise environment. Organizations relying on ManageEngine Desktop Central for endpoint management face significant risk of unauthorized access and potential data exfiltration. The vulnerability affects the integrity and confidentiality of the managed endpoints and can lead to persistent backdoors being established within the network infrastructure. Security teams must consider the potential for this vulnerability to be leveraged as a stepping stone for broader attacks against the organization's IT ecosystem.
Mitigation strategies should focus on immediate patching of affected systems to version 10.0.474 or later where the deserialization vulnerabilities have been addressed. Organizations should implement network segmentation to limit access to the affected servlet endpoints and consider disabling unnecessary servlets that may not be required for operations. Additional protective measures include implementing web application firewalls to monitor and filter malicious serialized data, conducting thorough code reviews to identify similar deserialization patterns, and establishing runtime monitoring to detect anomalous deserialization activities. Security configurations should enforce strict input validation and sanitization for all data processing components, particularly those handling serialized objects. Regular vulnerability assessments and penetration testing should be conducted to identify potential similar weaknesses in the application architecture. The remediation approach should align with industry best practices for secure coding and follow the principle of least privilege to minimize the impact of any successful exploitation attempts.