dbcve.org
RmmApplication · Barracuda

CVE-2025-34394

CRITICAL · 9.8 CVSS v3.1 Published 2025-12-10
Fix available
A fix is available. Upgrade to 2025.1.1 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The Barracuda RMM Service Center exposes a .NET Remoting service that lacks proper safeguards against deserialization of arbitrary types. This unsafe deserialization vulnerability allows an unauthenticated attacker to execute arbitrary code on the affected system remotely.

MitigationUpgrade Barracuda RMM to version 2025.1.1 or later to address the vulnerability; if immediate patching is not possible, consider network segmentation to limit exposure of the affected service.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
RmmApplication
Affected:< 2025.1.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify Barracuda RMM is installed
    Check the system for Barracuda RMM installation - look for the product in installed programs (Windows Add/Remove Programs, or Linux package managers if applicable), or check for Barracuda RMM service processes running on the system
    Affected if Barracuda RMM software is found on the system
  2. Identify installed Barracuda RMM version
    Locate the Barracuda RMM version information - this is typically available in the product UI under Help/About, or via the installed software registry/files. Compare the installed version number against the affected range: versions prior to 2025.1.1 are vulnerable
    Affected if Installed version is lower than 2025.1.1 (e.g., 2025.1.0, 2024.x, etc.)
  3. Confirm Service Center component is active
    Check if the Barracuda RMM Service Center component is running - look for the Service Center service/process or check if the service is exposed on expected network ports. The vulnerability exists in the Service Center .NET Remoting service
    Affected if Service Center is running and accessible on the network
  4. Check network exposure of the Remoting service
    Identify which ports the .NET Remoting service is listening on (typically configured during Barracuda RMM setup). Use netstat or similar tools to see if the service is bound to network interfaces accessible from untrusted networks
    Affected if The Remoting service port is exposed to untrusted networks or the internet rather than only to trusted internal networks

A system is affected if Barracuda RMM with version lower than 2025.1.1 is installed and the Service Center .NET Remoting service is running and accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2025.1.1 or later
Fixed in 2025.1.1
Interim mitigation

Upgrade Barracuda RMM to version 2025.1.1 or later to address the vulnerability; if immediate patching is not possible, consider network segmentation to limit exposure of the affected service.

Recommended fix High confidence

2025.1.1

  1. 1. Back up the current RMM installation and all associated data before proceeding with the upgrade
  2. 2. Obtain the RMM version 2025.1.1 or later from the official Barracuda download portal (download.mw-rmm.barracudamsp.com or through Barracuda MSP partner channels)
  3. 3. Follow Barracuda's standard upgrade procedure for the RMM solution, ensuring the Service Center component is updated
  4. 4. After upgrade completion, verify that the .NET Remoting service in Barracuda Service Center is no longer exposed or is properly protected
  5. 5. Confirm the RMM solution is fully operational and all services have started successfully

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Rmm Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing4.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,720
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,752.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-34394 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data