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2 vulnerabilities by Seagull Software, LLC.

CVE-2026-25551 (GCVE-0-2026-25551)

Vulnerability from cvelistv5 – Published: 2026-06-04 17:20 – Updated: 2026-06-04 17:20
VLAI
Title
Seagull Software BarTender Deserialization Privilege Escalation via .NET Remoting Service
Summary
Seagull Software BarTender 2021 R1 through 12.0.1 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.
Severity
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Seagull Software, LLC. BarTender 2021 Affected: R1 , ≤ 12.0.1 (custom)
Create a notification for this product.
Date Public
2026-06-03 16:00
Credits
Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp. Jan A. Rodriguez, Pentester, GM Sectec, Corp. VulnCheck
Show details on NVD website
To clipboard 

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CVE-2026-25550 (GCVE-0-2026-25550)

Vulnerability from cvelistv5 – Published: 2026-06-04 17:13 – Updated: 2026-06-04 17:50
VLAI
Title
Seagull Software BarTender Unauthenticated RCE via .NET Remoting Service
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 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.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-306 - Missing Authentication for Critical Function
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-06-03 00:00
Credits
Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp. Jan A. Rodriguez, Pentester, GM Sectec, Corp. VulnCheck
Show details on NVD website
To clipboard 

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