CVE-2026-58127 (GCVE-0-2026-58127)
Vulnerability from cvelistv5 – Published: 2026-07-01 14:41 – Updated: 2026-07-01 17:25
VLAI
EPSS
VEX
Title
PACSgear MediaWriter 5.2.1 Unauthenticated RCE via .NET Remoting TCP Service
Summary
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.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 16:15 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://gist.github.com/VAMorales/dc679ecab30b704… | technical-descriptionexploit |
| https://www.hyland.com/en/solutions/products/pacsgear | product |
| https://www.vulncheck.com/advisories/pacsgear-med… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Hyland | PACSgear MediaWriter |
Affected:
5.2.1
(semver)
|
guessed |
Date Public
2026-07-01 00:00
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