CVE-2026-102118 in Kiteworks
Summary
by MITRE • 10/01/2026
A local privilege escalation vulnerability in Kiteworks could have allowed an attacker with an existing shell under a low-privileged service account to escalate to root privileges on the appliance.
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Analysis
by VulDB Data Team • 10/01/2026
The identified vulnerability represents a critical local privilege escalation flaw within the Kiteworks software environment, specifically targeting scenarios where an adversary has already achieved initial access through a compromised low-privileged service account. This type of security weakness is fundamentally rooted in improper elevation control mechanisms or misconfigured system permissions that allow processes running under restricted user contexts to execute commands with higher privileges than intended by the system administrator. In enterprise environments utilizing Kiteworks, such as secure file transfer and collaboration platforms, service accounts are often granted specific operational rights necessary for application functionality but should strictly be isolated from administrative capabilities. When these isolation boundaries fail due to a software defect or configuration error, it creates a pathway for attackers to bypass standard access controls and gain unrestricted control over the underlying operating system.
From a technical perspective, this vulnerability likely involves an abuse of system resources such as setuid binaries, writable configuration files accessible by lower-privileged users, or insecure environment variable handling that allows command injection during privilege elevation processes. The attacker leverages their existing shell session to exploit these weaknesses, potentially through techniques like binary exploitation, path traversal in script execution, or manipulating scheduled tasks and cron jobs that run with elevated permissions. Once the escalation is successful, the attacker obtains root-level access, which grants them complete control over the appliance. This includes the ability to modify system configurations, install persistent backdoors, exfiltrate sensitive data stored on the device, and pivot further into other network segments connected to or managed by this specific instance of Kiteworks.
The operational impact of such a vulnerability is severe, as it effectively nullifies many layers of defense-in-depth strategies that rely on least-privilege principles. An attacker with root access can disable logging mechanisms to cover their tracks, modify authentication credentials for other users, and potentially compromise the integrity of data stored within the Kiteworks repository if local storage permissions are also misconfigured. Furthermore, because Kiteworks often handles sensitive corporate documents and communications, a breach at this level poses significant risks related to confidentiality, integrity, and availability. It may lead to regulatory non-compliance depending on the nature of the data involved, such as personally identifiable information or protected health information subject to HIPAA or GDPR regulations.
In terms of industry classification frameworks, this vulnerability aligns with CWE-269: Improper Privilege Management, which covers cases where software does not properly assign privileges to actors based on their authorization levels. Additionally, the exploitation technique falls under MITRE ATT&CK tactic T1068: Exploitation for Privilege Escalation, specifically referencing methods like binary privilege escalation or permission modification attacks. Understanding these mappings helps security teams categorize the risk accurately and prioritize remediation efforts within broader vulnerability management programs.
To mitigate this risk, organizations must ensure that Kiteworks appliances are updated to versions where the specific elevation flaw has been patched by the vendor. Beyond software updates, strict adherence to hardening guidelines is essential. This includes enforcing least-privilege configurations for all service accounts, ensuring that no low-privileged user can write to critical system directories or configuration files used during startup processes. Regular auditing of file permissions and ownership on the appliance should be conducted to detect any unauthorized changes. Additionally, implementing robust monitoring solutions that alert on unusual privilege escalation attempts or unexpected root-level activity from service accounts can provide early detection capabilities. Network segmentation also plays a crucial role in limiting the blast radius if an initial compromise occurs, ensuring that even with local access, lateral movement remains constrained by firewall rules and zero-trust architecture principles.