PACSgear MediaWriter 5.2.1 exposes a .NET Remoting TCP service on port 9000 via PacsgearMediaServerEngine.dll, registered with ObjectURIs RemoteObj and UIRemoteObj, without any authentication requirement. By exploiting the MarshalByRefObject object unmarshalling technique and implementing .NET WebClient class methods, an unauthenticated remote attacker can read and write arbitrary files on the host filesystem. The ObjectURIs are identical across all installations by default. Chaining the arbitrary file write primitive with DLL hijacking opportunities in the MediaWriter service (which runs as NT Authority\\SYSTEM and loads missing DLLs such as CRYPTBASE.DLL from the application directory) enables unauthenticated remote code execution as SYSTEM upon service restart.
References
| Link | Resource |
|---|---|
| https://gist.github.com/VAMorales/dc679ecab30b7045fa07bf3249a034d8 | Exploit Third Party Advisory |
| https://www.hyland.com/en/solutions/products/pacsgear | Product |
| https://www.vulncheck.com/advisories/pacsgear-mediawriter-unauthenticated-rce-via-net-remoting-tcp-service | Third Party Advisory VDB Entry |
Configurations
History
09 Jul 2026, 02:37
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:hyland:pacsgear:*:*:*:*:*:*:*:* | |
| First Time |
Hyland pacsgear
Hyland |
|
| References | () https://gist.github.com/VAMorales/dc679ecab30b7045fa07bf3249a034d8 - Exploit, Third Party Advisory | |
| References | () https://www.hyland.com/en/solutions/products/pacsgear - Product | |
| References | () https://www.vulncheck.com/advisories/pacsgear-mediawriter-unauthenticated-rce-via-net-remoting-tcp-service - Third Party Advisory, VDB Entry |
01 Jul 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-07-01 16:16
Updated : 2026-07-09 02:37
NVD link : CVE-2026-58127
Mitre link : CVE-2026-58127
CVE.ORG link : CVE-2026-58127
JSON object : View
Products Affected
hyland
- pacsgear