by Kastro
Paper/Archive/CVE-2025-34153

CVE-2025-34153

Hyland Software OnBase — Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE

EPSS 0.7%public exploitCVSS 10.0
critical.is priorityof 100
50
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 51.5.515 × 2010.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Hyland OnBase versions prior to 17.0.2.87 (other versions may be affected) are vulnerable to unauthenticated remote code execution via insecure deserialization on the .NET Remoting TCP channel. The service registers a listener on port 6031 with the URI endpoint TimerServer, implemented in Hyland.Core.Timers.dll. This endpoint deserializes untrusted input using the .NET BinaryFormatter, allowing attackers to execute arbitrary code under the context of NT AUTHORITY\SYSTEM.

Affected

ProductAffectedFixed inSource
OnBase< 17.0.2.8717.0.2.87CNA

Scores by source

VulnCheck (CNA)10.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgist.github.com/VAMorales/32794cccc2195a935623a12ef32760dcrefhyland.com/en/internal/onbase-unity-clientpatchsupport.hyland.com/r/OnBase/WorkView/Foundation-24.1/WorkView/Installation/Upgrade-Considerations/Upgrading-to-OnBase-Version-Foundation-24.1writeupvulncheck.com/advisories/hyland-onbase-net-remoting-tcp-channel-unauthenticated-rceadvisorycommunity.hyland.com/resources/bulletins-and-notices/210540-security-update-hyland-timer-service-bulletin-ob2025-02