CVE-2026-34014 in Download Station
Summary
by MITRE • 10/15/2026
An incorrect permission assignment for critical resource vulnerability has been reported to affect Download Station. If a local attacker gains an administrator account, they can then exploit the vulnerability to compromise the security of the system.
We have already fixed the vulnerability in the following version: Download Station 5.10.1.312 and later Download Station 5.11.2.321 and later
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Analysis
by VulDB Data Team • 10/15/2026
The reported vulnerability represents a critical flaw in access control mechanisms within the Download Station application, specifically categorized under CWE-732 as incorrect permission assignment for critical resource. This type of vulnerability arises when an application fails to properly enforce restrictions on who can perform specific actions or access certain data resources. In this instance, the security boundary is compromised because the system does not adequately validate whether a user with administrative privileges has been granted appropriate rights to execute sensitive operations within the Download Station module. While having an administrator account typically implies high-level trust and broad permissions, the principle of least privilege dictates that even privileged accounts should be restricted from performing actions outside their specific scope unless explicitly authorized for those tasks. The failure to implement these granular controls creates a pathway where administrative capabilities can be misused or escalated in unintended ways, undermining the integrity of the system's security model.
From an operational perspective, this vulnerability allows a local attacker who has already obtained administrator credentials to exploit the flawed permission logic to compromise the broader system security. Although the initial access point requires authentication as an admin, which might seem like a significant barrier for external attackers, it poses severe risks in scenarios where administrative accounts are compromised through phishing, credential stuffing, or other lateral movement techniques by internal threats or malware residing on the network. Once exploited, this flaw can lead to unauthorized modification of system configurations, manipulation of download tasks that could introduce malicious payloads into the storage environment, or potential privilege escalation if the application interacts with underlying operating system components without proper sandboxing. The impact extends beyond simple data theft; it affects the availability and integrity of services provided by NAS devices running Download Station, potentially disrupting business operations and exposing sensitive corporate data to unauthorized parties.
This vulnerability aligns with ATT&CK technique T1078, Valid Accounts, as it relies on legitimate credentials being used in an abusive manner due to insufficient segmentation of privileges. It also reflects weaknesses often seen in CWE-269, Improper Privilege Management, where the application does not correctly distinguish between different levels of administrative authority or fails to restrict actions based on context. The existence of such a flaw indicates that the security architecture relied too heavily on broad admin rights rather than implementing role-based access control (RBAC) with fine-grained permissions for specific modules like Download Station. This lack of isolation means that a compromise in one area can easily cascade into broader system-wide consequences, violating fundamental cybersecurity principles regarding defense-in-depth and separation of duties.
To mitigate this risk, it is imperative to upgrade the affected software immediately to fixed versions where these permission checks have been corrected. Specifically, users must ensure they are running Download Station version 5.10.1.312 or later for older branches, or version 5.11.2.321 and later for newer branches. These updates contain the necessary code changes to enforce stricter access controls and validate user permissions before allowing critical operations within the application. Beyond software patching, organizations should review their administrative account policies to ensure that admin credentials are not shared widely and are protected with multi-factor authentication where possible. Regular audits of permission assignments across all installed applications on NAS devices can help identify similar misconfigurations early. Additionally, monitoring logs for unusual activities by administrator accounts can provide an additional layer of detection against exploitation attempts, ensuring that any attempt to leverage these elevated privileges is identified and blocked promptly.