---
id: CVE-2026-25550
title: >-
  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
summary: >-
  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 singl…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-306
  - CWE-502
vendor: 'Seagull Software, LLC.'
product: BarTender 2010
affected:
  - bartender_2010 <= 10.1 R4
  - bartender_2016 <= R9
  - bartender_2019 <= R10
published: '2026-06-04'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T16:17:07.137'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-25550'
references:
  - url: 'https://gist.github.com/VAMorales/dde5b1c0415a8505ccd6fafdb095a618'
    label: disclosure@vulncheck.com
  - url: 'https://portal.seagullscientific.com/downloads/bartender'
    label: disclosure@vulncheck.com
  - url: >-
      https://trust.seagullsoftware.com/?tcuUid=55ed135f-683c-4e9b-a59d-7d4373c0ac7e
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/seagull-software-bartender-unauthenticated-rce-via-net-remoting-service
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.01424
epssPercentile: 0.71736
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-06-04T17:49:19.290960Z'
ingestedAt: '2026-09-02T17:48:01.584Z'
---

## Overview

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 AUTHORITY\\SYSTEM. This vulnerability is corrected in BarTender 12.0.1. Users of affected releases should upgrade to BarTender 12.0.1 or later.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.