Vulnerability · Published Mar 26, 2026 · Assigned by SEC-VLab
CVE-2026-24068Missing XPC Client & NSXPC endpoint validation leads to privilege escalation in Vienna Assistant (MacOS) - Vienna Symphonic Library
High 8.8
In plain English
A high-severity missing authentication in Vienna Assistant from Vienna Symphonic Library GmbH. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Official description
The VSL privileged helper does utilize NSXPC for IPC. The implementation of the "shouldAcceptNewConnection" function, which is used by the NSXPC framework to validate if a client should be allowed to connect to the XPC listener, does not validate clients at all. This means that any process can connect to this service using the configured protocol. A malicious process is able to call all the functions defined in the corresponding HelperToolProtocol. No validation is performed in the functions "writeReceiptFile" and “runUninstaller” of the HelperToolProtocol. This allows an attacker to write files to any location with any data as well as execute any file with any arguments. Any process can call these functions because of the missing XPC client validation described before. The abuse of the missing endpoint validation leads to privilege escalation.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Vienna Symphonic Library GmbH | Vienna Assistant | 1.2.542 |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://r.sec-consult.com/vsl third-party-advisory
- http://seclists.org/fulldisclosure/2026/Apr/3