CVE-2026-58127: PACSgear MediaWriter 5.2.1 exposes a .NET Remoting TCP service on port 9000 via PacsgearMediaServerEngine.dll,

Q: How do I fix CVE-2026-58127?

pacsgear: upgrade to newer than 5.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-58127 being exploited?

CVE-2026-58127 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-58127 affect?

CVE-2026-58127 affects pacsgear. Severity is critical (CVSS 9.8). 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 MarshalByRefObjec

Q: How urgent is CVE-2026-58127?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-58127 is a critical-severity flaw (CVSS 9.8) affecting pacsgear. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-306, CWE-502
Published	2026-07-01
Last modified	2026-10-25

Publisher (CNA): VulnCheck · Vendor: hyland

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-01 16:16 UTCPublished CVE record published
2026-10-25 17:10 UTCUpdated Record last modified

hyland pacsgear UPGRADE

Affected: <= 5.2.1

Fixed in: newer than 5.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pacsgear || rpm -q pacsgear || pacsgear --version

2. UPGRADE to newer than 5.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pacsgear

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pacsgear

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-58127?

pacsgear: upgrade to newer than 5.2.1. Exact commands for each OS are on this page.

Is CVE-2026-58127 being exploited?

CVE-2026-58127 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-58127 affect?

CVE-2026-58127 affects pacsgear. Severity is critical (CVSS 9.8). 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 MarshalByRefObjec

How urgent is CVE-2026-58127?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-58126 CRITICAL 9.8 UPGRADE PACSgear PACS Scan 5.2.1 contains an unauthenticated remote code execution vulnerability that allows remote at

References

← Back to latest CVEs