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CVE-2026-25550— Seagull Software BarTender Unauthenticated RCE via .NET Remoting Service

Quick assessment

Affected
Seagull Software, LLC. BarTender 2010
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Seagull BarTender是美国Seagull公司的一款企业级标签、条码和RFID设计与打印软件。 Seagull BarTender 2010版本、2016版本和2019版本存在代码问题漏洞，该漏洞源于.NET Remoting服务未经验证且配置不当，可能导致未经身份验证的远程攻击者利用对象反序列化读取或写入任意文件，或强制NTLMv2认证。

CVSS 9.8 · Critical EPSS 1.42% · P73

Affected Version Matrix 3

VendorProduct Version RangeStatus
Seagull Software, LLC. BarTender 2010 ≤ 10.1 R4 affected
Seagull Software, LLC. BarTender 2016 ≤ R9 affected
Seagull Software, LLC. BarTender 2019 ≤ R10 affected
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I. Basic Information for CVE-2026-25550

Vulnerability Information
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Vulnerability Title
Seagull Software BarTender Unauthenticated RCE via .NET Remoting Service
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Seagull BarTender 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Seagull BarTender是美国Seagull公司的一款企业级标签、条码和RFID设计与打印软件。 Seagull BarTender 2010版本、2016版本和2019版本存在代码问题漏洞，该漏洞源于.NET Remoting服务未经验证且配置不当，可能导致未经身份验证的远程攻击者利用对象反序列化读取或写入任意文件，或强制NTLMv2认证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Seagull Software, LLC. BarTender 2010 0 ~ 10.1 R4 -
Seagull Software, LLC. BarTender 2016 0 ~ R9 -
Seagull Software, LLC. BarTender 2019 0 ~ R10 -

II. Public POCs for CVE-2026-25550

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III. Intelligence Information for CVE-2026-25550

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Vendor Advisories for CVE-2026-25550 (1)

Proof of Concept for CVE-2026-25550 (1)

Vendor Pages for CVE-2026-25550 (2)

IV. Related Vulnerabilities

Same vendor: Seagull Software, LLC.
Same weakness: CWE-306