CVE-2025-34153

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.

CVSS v4.0

10.0 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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

EPSS

0.65% chance of exploitation in the next 30 days, 49th percentile

Published

2025-08-13

Updated

2026-05-15

Proof-of-concept exploits (1)

• https://gist.github.com/VAMorales/32794cccc2195a935623a12ef32760dc

References

• CVE Record
• NVD entry

Related

• CVE-2025-34152
• CVE-2025-34154
• CVE-2025-34151
• CVE-2025-34157
• CVE-2025-34150
• CVE-2025-34159