CVE-2025-34153 json
Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE
published 2025-08-13 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-24595
- cvss
- 10.0
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Hyland Software OnBase 17.0.2.87, 24.1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 14 mo ago
Exploit prediction
0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gist.github.com https://gist.github.com/VAMorales/32794cccc2195a935623a12ef32760dc referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 10.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| CNA | 4.0 | 10.0 | CVSS: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 |
Affected products
- Hyland Software OnBase
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
support.hyland.com
/r/OnBase/WorkView/Foundation-24.1/WorkView/Installation/Upgrade-Considerations/Upgrading-to-OnBase-Version-Fo
patch
-
gist.github.com
/VAMorales/32794cccc2195a935623a12ef32760dc
technical-description, exploit
-
community.hyland.com
/resources/bulletins-and-notices/210540-security-update-hyland-timer-service-bulletin-ob2025-02
vendor-advisory, mitigation, permissions-required
-
hyland.com
/en/internal/onbase-unity-client
product
-
vulncheck.com
/advisories/hyland-onbase-net-remoting-tcp-channel-unauthenticated-rce
third-party-advisory
Sources
- CVE List CVE-2025-34153
- NVD CVE-2025-34153
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