CVE-2014-1209 in vSphere Client
Summary
by MITRE
VMware vSphere Client 4.0, 4.1, 5.0 before Update 3, and 5.1 before Update 2 does not properly validate updates to Client files, which allows remote attackers to trigger the downloading and execution of an arbitrary program via unspecified vectors.
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Analysis
by VulDB Data Team • 05/10/2026
The vulnerability identified as CVE-2014-1209 represents a critical security flaw in VMware vSphere Client versions 4.0, 4.1, 5.0 before Update 3, and 5.1 before Update 2. This issue stems from insufficient validation mechanisms within the client update process, creating a pathway for remote attackers to manipulate the software installation and execution flow. The vulnerability operates at the application layer and specifically targets the client-side update mechanism that is designed to ensure software integrity and security. The flaw allows adversaries to exploit the update validation process and potentially execute malicious code on targeted systems.
The technical nature of this vulnerability aligns with CWE-20, which describes improper input validation, and more specifically relates to CWE-502, concerning deserialization of untrusted data. The vulnerability exists because the vSphere Client fails to properly validate the integrity and authenticity of update files before executing them on the target system. This weakness enables attackers to craft malicious update packages that appear legitimate to the client software but contain executable payloads designed to compromise the system. The unspecified vectors mentioned in the description suggest that multiple attack pathways may exist, potentially including web-based exploitation, file transfer protocols, or other network-based delivery mechanisms.
From an operational perspective, this vulnerability poses significant risks to enterprise environments that rely on VMware vSphere infrastructure for virtualization management. The ability to trigger arbitrary program execution remotely means that attackers could potentially gain full system control, install backdoors, or deploy additional malware. The impact extends beyond individual system compromise to potential network-wide infiltration, as compromised vSphere clients could serve as entry points for broader attacks within the enterprise infrastructure. Organizations using affected versions face the risk of unauthorized access to critical virtualized environments, potentially leading to data breaches, service disruption, and compliance violations.
The exploitation of this vulnerability typically requires network access to the vSphere Client environment and may involve crafting malicious update packages that bypass the client's validation checks. Attackers could potentially leverage this flaw through various attack vectors including web-based attacks, man-in-the-middle scenarios, or by compromising update servers. The remediation approach involves applying the appropriate VMware security patches and updates, specifically targeting the update validation mechanisms that were strengthened in subsequent releases. Organizations should also implement network monitoring to detect unusual update activity and consider network segmentation to limit the potential impact of such attacks. The vulnerability demonstrates the importance of maintaining current security patches and validating update mechanisms as outlined in the MITRE ATT&CK framework under the T1072 technique for software deployment tools.