Vulnerability-Lookup

GHSA-2Q9G-666G-VCP9

Vulnerability from github – Published: 2026-06-04 18:30 – Updated: 2026-06-04 18:30

Details

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

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-25550"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-04T18:16:28Z",
    "severity": "CRITICAL"
  },
  "details": "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 \u2014 BarTenderSystem for BarTender 2016 \u003c= R9, and DataServiceSingleton for BarTender 2019 \u003c= R10 \u2014 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.",
  "id": "GHSA-2q9g-666g-vcp9",
  "modified": "2026-06-04T18:30:33Z",
  "published": "2026-06-04T18:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25550"
    },
    {
      "type": "WEB",
      "url": "https://portal.seagullscientific.com/downloads/bartender"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/seagull-software-bartender-unauthenticated-rce-via-net-remoting-service"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-06-04 17:13 – Updated: 2026-06-04 17:50

Title

Seagull Software BarTender Unauthenticated RCE via .NET Remoting Service

Summary

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

VulnCheck

References

2 references

URL	Tags
https://portal.seagullscientific.com/downloads/ba…	product
https://www.vulncheck.com/advisories/seagull-soft…	third-party-advisory

Impacted products

3 products

Vendor	Product	Version
Seagull Software, LLC.	BarTender 2010	Affected: 0 , ≤ 10.1 R4 (custom)
Seagull Software, LLC.	BarTender 2016	Affected: 0 , ≤ R9 (custom)
Seagull Software, LLC.	BarTender 2019	Affected: 0 , ≤ R10 (custom)

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

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-2Q9G-666G-VCP9

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

Tags

Sightings

Nomenclature