PT-2026-46297 · Seagull · Bartender 2010+2

Vulncheck · Published 2026-06-04 · Updated 2026-06-04 · CVE-2026-25550

Mitre

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Seagull Software BarTender 2010, 2016, and 2019 contain an unauthenticated remote code execution vulnerability in the .NET Remoting service exposed on TCP port 7375 via BtSystem.Service.exe. The service registers an unauthenticated singleton endpoint — BarTenderSystem for BarTender 2016 <= R9, and DataServiceSingleton for BarTender 2019 <= R10 — configured with BinaryServerFormatterSinkProvider and TypeFilterLevel set to Full. An unauthenticated remote attacker can exploit .NET Remoting object unmarshalling to read or write arbitrary files on the server using the .NET WebClient class, or coerce NTLMv2 authentication by supplying a UNC path to an attacker-controlled server, enabling sensitive credential disclosure, remote code execution, or lateral movement depending on service account privileges and network environment. The service runs in the context of NT AUTHORITYSYSTEM.

Fix

Deserialization of Untrusted Data

Missing Authentication

Weakness Enumeration

CWE-502

CWE-306

Related Identifiers

CVE-2026-25550

Affected Products

Bartender 2010

Bartender 2016

Bartender 2019

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-25550 · Security Note
• https://portal.seagullscientific.com/downloads/bartender · Note
• https://vulncheck.com/advisories/seagull-software-bartender-unauthenticated-rce-via-net-remoting-service · Note