πŸ›‘οΈ CVE-2026-25551
🟠 CVSS 7.8 β€” High βœ… No Known Exploit CWE-502 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Seagull Software BarTender 2021 R1 through 12.0.1Β contains an insecure deserialization vulnerability that allows low-privileged local users to escalate privileges. The DataServiceSingleton .NET Remoting endpoint is bound to localhost on TCP port 7375 via BtSystem.Service.exe, limiting the attack surface to local access only. The endpoint is configured with BinaryServerFormatterSinkProvider and TypeFilterLevel set to Full. A low-privileged local attacker can send YSoSerial.NET-generated BinaryFormatter payloads to the localhost-bound endpoint to achieve code execution as NT AUTHORITY\\SYSTEM.

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-502
Public Exploit βœ… No
Source NVD
Published 2026-06-04
Updated 2026-06-05
Modified 2026-06-04
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown β€” β€”

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