Description

Improper access control to the Synergis Softwire installation folder. This vulnerability affects Streamvault all-in-one appliances (SV-100E and SV-300E series) and Synergis Softwire installed on Windows servers.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.9",
  "pubDate": "2026-08-28T00:17:28.117Z",
  "pubdate": "2026-08-28T00:17:28.117Z",
  "executiveSummary": "This vulnerability involves improper access control permissions within the Synergis Softwire installation directory. The flaw affects Streamvault all-in-one appliances (specifically the SV-100E and SV-300E series) and instances of Synergis Softwire deployed on Windows-based server environments.\nThe security deficiency arises from insecure directory permissions that may allow unauthorized local users to interact with, modify, or execute files residing within the application installation path. By gaining inappropriate read, write, or execute access, a malicious actor could potentially compromise the integrity of the security infrastructure, leading to unauthorized code execution, privilege escalation, or tampering with sensitive system configurations.\nThe risk is categorized as critical for physical security deployments where local system access is possible. Attackers capable of authenticating to the host operating system or leveraging local entry points can exploit these permissions to bypass intended security boundaries. Exploitation does not necessarily require advanced network-level access, but rather relies on the existing permission structure of the filesystem where Synergis Softwire is hosted. Organizations must ensure that the principle of least privilege is applied to service directories to mitigate the risk of unauthorized local intervention.",
  "technicalDetails": "The root cause of this vulnerability is the assignment of overly permissive Access Control Lists (ACLs) to the Synergis Softwire installation directory during or after the deployment process. In Windows environments, the security of an application is heavily reliant on the NTFS permissions assigned to its executable binaries, configuration files, and dynamically linked libraries.\nWhen the installation folder is configured with permissions that grant non-privileged users or the 'Users' group write or modify access, the integrity of the application becomes susceptible to malicious manipulation. An attacker with standard user-level access to the host machine can leverage these weak ACLs to perform several malicious operations. First, they may overwrite legitimate executable files or dynamic link libraries (DLLs) with malicious payloads, leading to arbitrary code execution when the Synergis service or a system administrator initiates the application. This is a classic example of DLL hijacking or binary planting.\nThe attack flow generally follows a sequence where the local user identifies the insecure path associated with the Synergis Softwire installation. Once identified, the attacker replaces an intended functional component with a malicious surrogate. If the service runs with elevated privileges (such as SYSTEM or a high-privilege service account), the malicious code will inherit these privileges upon execution. This allows for lateral movement within the host, extraction of sensitive security credentials, or the modification of configuration files to disable security monitoring features.\nFurthermore, the improper access control allows for the unauthorized modification of configuration files that dictate the operational parameters of the Synergis Softwire system. By altering these files, an attacker can downgrade security settings, bypass authentication requirements, or redirect communication streams. Because the vulnerability exists within the application's local directory structure, it affects all configurations of Synergis Softwire on Windows servers and the specific Streamvault SV-100E and SV-300E hardware appliances. The exposure is largely limited to local or remote authenticated users who have sufficient access to navigate the filesystem, but the impact is profound, as it facilitates a complete compromise of the security appliance's functional integrity. Post-exploitation, the attacker maintains a persistent foothold on the server, potentially allowing for the long-term monitoring of physical security events or the suppression of security alerts generated by the appliance."
}