What is CVE-2025-34394?

CVE-2025-34394 is a critical-severity vulnerability in Barracuda Rmm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-12-10.

How severe is CVE-2025-34394?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Barracuda Rmm

CVE-2025-34394

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 executio…

Vulnerability class: Insecure Deserialization

EPSS: 0.006 (43.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Barracuda Rmm
Barracuda Networks Rmm — versions 2025.1

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

disclosure@vulncheck.com (vendor-advisory, Release Notes, patch)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2025-34394?: CVE-2025-34394 is a critical-severity vulnerability in Barracuda Rmm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-12-10.
How severe is CVE-2025-34394?: Critical severity. CVSS v3 base score is 9.8 out of 10.