CVE-2025-27816Network attack vector

Unauthenticated server compromise via .NET message deserialization

Published Mar 7, 2025 · Updated Mar 7, 2025

Insecure deserialization in Arctera InfoScale Enterprise for Windows 8.0.2 and earlier allows remote attackers to compromise servers. The Plugin_Host service accepts potentially untrusted messages at a .NET remoting endpoint and deserializes them without a trust boundary. The endpoint is relevant only when applications use Disaster Recovery configured through the DR wizard, and exploitation requires network access to the service.

CVSS severity9.8
Critical
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure deserialization in Arctera InfoScale Enterprise for Windows 8.0.2 and earlier allows remote attackers to compromise servers. The Plugin_Host service accepts potentially untrusted messages at a .NET remoting endpoint and deserializes them without a trust boundary. The endpoint is relevant only when applications use Disaster Recovery configured through the DR wizard, and exploitation requires network access to the service.

The record

CVE
CVE-2025-27816
Published
Mar 7, 2025
Updated
Mar 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-502, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8ArcteraCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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