CVE-2025-34394: Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, exposes a .NET Re

Q: How do I fix CVE-2025-34394?

rmm: upgrade to 2025.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-34394 being exploited?

CVE-2025-34394 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-2025-34394 affect?

CVE-2025-34394 affects rmm. Severity is critical (CVSS 9.8). Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, exposes a .NET Remoting service that is insufficiently protected against deserialization of arbitrary types. This can lead to remote code execution

Q: How urgent is CVE-2025-34394?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-34394 is a critical-severity flaw (CVSS 9.8) affecting rmm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, exposes a .NET Remoting service that is insufficiently protected against deserialization of arbitrary types. This can lead to remote code execution.

Why this priority

Critical severity
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	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-502
Published	2025-12-10
Last modified	2026-10-14

Publisher (CNA): VulnCheck · Vendor: barracuda

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-10 16:16 UTCPublished CVE record published
2026-10-14 21:10 UTCUpdated Record last modified

barracuda rmm UPGRADE

Affected: < 2025.1.1

Fixed in: 2025.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2025.1.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rmm

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-2025-34394?

rmm: upgrade to 2025.1.1. Exact commands for each OS are on this page.

Is CVE-2025-34394 being exploited?

CVE-2025-34394 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-2025-34394 affect?

CVE-2025-34394 affects rmm. Severity is critical (CVSS 9.8). Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, exposes a .NET Remoting service that is insufficiently protected against deserialization of arbitrary types. This can lead to remote code execution

How urgent is CVE-2025-34394?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-34392 CRITICAL 9.8 UPGRADE Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, does not verify t
CVE-2025-34393 CRITICAL 9.8 UPGRADE Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, does not correctl
CVE-2025-34395 HIGH 7.5 UPGRADE Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, exposes a .NET Re

References

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