CVE-2025-14600 in vsDesk
Summary
by MITRE • 08/19/2026
An insecure deserialization vulnerability in vsDesk allows a remote attacker to gain unauthorized administrative access. By manipulating application configuration data, an attacker can force the system to authenticate against an arbitrary LDAP server and provision a new administrative account.
Apply patch from vendor https://vsdesk.ru/ . Versions 14.0402 and on have the patch.
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Analysis
by VulDB Data Team • 08/19/2026
The vulnerability identified in vsDesk represents a critical insecure deserialization flaw that fundamentally compromises the integrity of application configuration data processing. This specific weakness stems from the system's failure to properly validate or sanitize untrusted input before it is processed by internal serialization mechanisms, allowing an attacker to inject malicious payloads into the configuration structures. In many modern web applications and enterprise software suites, configuration files often contain serialized objects that are automatically deserialized upon loading or update operations. When these inputs are not rigorously checked against a whitelist of expected types or values, they can be manipulated by remote attackers to execute arbitrary logic within the context of the application server. This class of vulnerability is widely recognized in industry standards as CWE-502, which denotes Deserialization of Untrusted Data, and it frequently serves as an initial vector for more severe attacks such as Remote Code Execution or privilege escalation depending on the surrounding environment's security controls.
The operational impact of this flaw is particularly severe due to its direct consequence: unauthorized administrative access through LDAP manipulation. By exploiting the insecure deserialization point, a remote attacker can alter the application’s authentication configuration parameters without possessing valid credentials. Specifically, the vulnerability allows the modification of Lightweight Directory Access Protocol settings, enabling the system to be forced into authenticating against an arbitrary LDAP server controlled by the attacker. This capability effectively bypasses local security controls and user management systems. Once the connection is redirected to a malicious directory service, the attacker can provision new administrative accounts within vsDesk using credentials they control. This results in a complete compromise of the application's confidentiality, integrity, and availability from an operational standpoint, as the attacker gains full control over system configurations, data access permissions, and potentially sensitive business information stored or processed by the platform.
From a threat intelligence perspective, this attack pattern aligns with techniques observed in advanced persistent threats where initial access is gained through configuration manipulation rather than direct exploitation of runtime memory vulnerabilities. The use of LDAP for authentication hijacking corresponds to ATT&CK technique T1078, specifically Valid Accounts and External Managed Accounts, as the attacker leverages legitimate-looking but maliciously provisioned credentials to maintain persistence and escalate privileges within the target environment. Furthermore, the ability to modify configuration data remotely touches upon CWE-20 Improper Input Validation, highlighting a systemic failure in ensuring that only authorized changes are applied to critical system parameters. The combination of these factors creates a high-severity risk profile where a single unauthenticated request can lead to total administrative compromise without requiring prior authentication or complex exploitation chains beyond the initial deserialization trigger.
Mitigation strategies must prioritize immediate remediation through vendor-supplied patches, as this is an application-level logic flaw that cannot be fully mitigated by network perimeter defenses alone. Organizations running versions of vsDesk prior to 14.0402 are advised to apply the patch provided directly by the vendor at https://vsdesk.ru/ immediately upon availability. For environments where immediate patching is not feasible, temporary compensating controls should include strict input validation on all configuration endpoints and disabling any unnecessary deserialization functionality if supported by the architecture. Additionally, implementing robust logging and monitoring for unusual LDAP connection attempts or sudden changes in authentication provider settings can aid in early detection of exploitation attempts. It is also recommended to review access logs for any newly created administrative accounts that do not correspond to known user provisioning events, as this may indicate successful exploitation of this vulnerability. Long-term remediation involves adopting secure coding practices that enforce strict type checking during deserialization operations and utilizing allow-lists rather than deny-lists when processing external inputs in configuration management modules.