CVE-2026-58126 PACSgear PACS Scan 5.2.1 Unauthenticated RCE via .NET Remoting TCP Service
Unauthenticated attackers can achieve remote code execution as SYSTEM by exploiting exposed .NET Remoting services and DLL hijacking in PACSgear PACS Scan.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-58126?
CVE-2026-58126 is a critical unsafe deserialization vulnerability in Hyland PACSgear PACS Scan, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PACSgear PACS Scan 5.2.1 contains an unauthenticated remote code execution vulnerability that allows remote attackers to read and write arbitrary files by exploiting an exposed .NET Remoting TCP service on port 22222 via PGImageExchQueue.exe without any authentication requirement. Attackers can chain the arbitrary file write primitive with DLL hijacking in PGImageExchangeQueueSvc.exe, which loads missing DLLs such as CRYPTSP.DLL from the application directory, to achieve remote code execution as NT Authority\SYSTEM upon service restart.
Which versions are affected by CVE-2026-58126?
It affects 1 product.
Products include Hyland Pacsgear.
How do I fix CVE-2026-58126?
No fix has been published for CVE-2026-58126 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-58126 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58126 exists.
Other vulnerabilities in Hyland PACSgear PACS Scan
Sources
Also known as GHSA-v3r5-hc9j-49g7.