CVE-2026-25551: fallo de gravedad alta en Seagull Software, LLC. BarTender 2021
Seagull Software BarTender Deserialization Privilege Escalation via .NET Remoting Service
Publicada el · Actualizada el
41Vexday Risk Score
Sin señal de explotación. Ella tiene prueba de concepto pública.
ssvc Attendcvss 8.5epss 0.4%
probabilidad de explotación
0.4%top 73% de las CVE
explotación observada
noninguna fuente lo reporta
1 exploit(s) público(s)
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. The vulnerability was corrected in BarTender 12.1, released on August 14, 2026. Users should upgrade to BarTender 12.1 or later.
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
Productos afectados
Seagull Software, LLC. · BarTender 2021PoCs públicas encontradas — 1
cve_referencegist.github.com/VAMorales/dde5b1c0415a8505ccd6fafdb095a618no verificado⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
Referencias
https://gist.github.com/VAMorales/dde5b1c0415a8505ccd6fafdb095a618https://portal.seagullscientific.com/downloads/bartenderhttps://trust.seagullsoftware.com/?tcuUid=55ed135f-683c-4e9b-a59d-7d4373c0ac7ehttps://www.vulncheck.com/advisories/seagull-software-bartender-deserialization-privilege-escalation-via-net-remoting-service