Vulnerability-Lookup

FKIE_CVE-2026-25551

Vulnerability from fkie_nvd - Published: 2026-06-04 18:16 - Updated: 2026-07-22 20:10

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

References

	URL	Tags
	disclosure@vulncheck.com	https://gist.github.com/VAMorales/dde5b1c0415a8505ccd6fafdb095a618
	disclosure@vulncheck.com	https://portal.seagullscientific.com/downloads/bartender
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/seagull-software-bartender-deserialization-privilege-escalation-via-net-remoting-service

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "affected",
          "product": "BarTender 2021",
          "vendor": "Seagull Software, LLC.",
          "versions": [
            {
              "lessThanOrEqual": "12.0.1",
              "status": "affected",
              "version": "R1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Seagull Software BarTender 2021 R1 through 12.0.1\u00a0contains 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."
    },
    {
      "lang": "es",
      "value": "Seagull Software BarTender 2021 R1 hasta 12.0.1 contiene una vulnerabilidad de deserializaci\u00f3n insegura que permite a usuarios locales con pocos privilegios escalar privilegios. El endpoint de .NET Remoting DataServiceSingleton est\u00e1 enlazado a localhost en el puerto TCP 7375 a trav\u00e9s de BtSystem.Service.exe, limitando la superficie de ataque a solo acceso local. El endpoint est\u00e1 configurado con BinaryServerFormatterSinkProvider y TypeFilterLevel establecido en Full. Un atacante local con pocos privilegios puede enviar cargas \u00fatiles de BinaryFormatter generadas por YSoSerial.NET al endpoint enlazado a localhost para lograr la ejecuci\u00f3n de c\u00f3digo como NT AUTHORITY\\\\SYSTEM."
    }
  ],
  "id": "CVE-2026-25551",
  "lastModified": "2026-07-22T20:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.5,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-25551",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-08T18:27:59.962309Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-04T18:16:28.923",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://gist.github.com/VAMorales/dde5b1c0415a8505ccd6fafdb095a618"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://portal.seagullscientific.com/downloads/bartender"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/seagull-software-bartender-deserialization-privilege-escalation-via-net-remoting-service"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-06-04 17:20 – Updated: 2026-06-08 18:28

Title

Seagull Software BarTender Deserialization Privilege Escalation via .NET Remoting Service

Summary

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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

VulnCheck

References

3 references

URL	Tags
https://gist.github.com/VAMorales/dde5b1c0415a850…	technical-descriptionexploit
https://portal.seagullscientific.com/downloads/ba…	product
https://www.vulncheck.com/advisories/seagull-soft…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Seagull Software, LLC.	BarTender 2021	Affected: R1 , ≤ 12.0.1 (custom)

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

JSON

To clipboard

{
  "containers": {
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-25551",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-08T18:27:59.962309Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-08T18:28:36.362Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "product": "BarTender 2021",
          "vendor": "Seagull Software, LLC.",
          "versions": [
            {
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            }
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      ],
      "credits": [
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          "type": "finder",
          "value": "Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp."
        },
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          "lang": "en",
          "type": "finder",
          "value": "Jan A. Rodriguez, Pentester, GM Sectec, Corp."
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "VulnCheck"
        }
      ],
      "datePublic": "2026-06-03T16:00:00.000Z",
      "descriptions": [
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      "metrics": [
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    "datePublished": "2026-06-04T17:20:09.946Z",
    "dateReserved": "2026-02-02T20:12:33.395Z",
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

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FKIE_CVE-2026-25551

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

Tags

Sightings

Nomenclature