CVE-2025-34394Network attack vector

Unauthenticated code execution via arbitrary-type deserialization

Published Dec 10, 2025 · Updated Dec 10, 2025

Deserialization of untrusted data in Barracuda RMM before 2025.1.1 allows remote attackers to execute arbitrary code through Service Center. The exposed .NET Remoting service accepts attacker-controlled serialized objects without sufficiently restricting their types before deserialization. Unauthenticated network access to that service is sufficient, and successful exploitation executes code in the Service Center process context.

CVSS severity9.8
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in Barracuda RMM before 2025.1.1 allows remote attackers to execute arbitrary code through Service Center. The exposed .NET Remoting service accepts attacker-controlled serialized objects without sufficiently restricting their types before deserialization. Unauthenticated network access to that service is sufficient, and successful exploitation executes code in the Service Center process context.

The record

CVE
CVE-2025-34394
Published
Dec 10, 2025
Updated
Dec 10, 2025
Vendor
Barracuda Networks
Product
Barracuda RMM
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2025.1 <2025.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Barracuda Networks · Barracuda RMMversion=2025.1 <2025.1.1

Published CVSS scores

10.0VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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