Answer in brief
CVE-2026-25550 records a Critical severity (CVSS 9.8) vulnerability in Seagull Software BarTender Unauthenticated RCE via .NET Remoting Service. The current sources do not mark it as known exploited. The current feed maps Seagull Software, LLC./BarTender 2010 (generic), Seagull Software, LLC./BarTender 2010 (generic), Seagull Software, LLC./BarTender 2016 (generic), Seagull Software, LLC./BarTender 2016 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Seagull Software, LLC./BarTender 2010 (generic), Seagull Software, LLC./BarTender 2010 (generic), Seagull Software, LLC./BarTender 2016 (generic), Seagull Software, LLC./BarTender 2016 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Seagull Software, LLC./BarTender 2010generic | * | Not reported |
| Seagull Software, LLC./BarTender 2010generic | 0 | Not reported |
| Seagull Software, LLC./BarTender 2016generic | * | Not reported |
| Seagull Software, LLC./BarTender 2016generic | 0 | Not reported |
| Seagull Software, LLC./BarTender 2019generic | * | Not reported |
| Seagull Software, LLC./BarTender 2019generic | 0 | Not reported |
Published upstream
Jun 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 2, 2026
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.
Quoted source text, attributed separately from HOL analysis.