CVE-2021-27460Network attack vector

Unauthenticated server takeover via unsafe .NET deserialization

Published Mar 23, 2022 · Updated Apr 16, 2025

Deserialization of untrusted data in FactoryTalk AssetCentre 10.00 and earlier allows remote attackers to take over servers and agents. .NET Remoting endpoints deserialize attacker-controlled objects without sufficiently validating the resulting object graph. No authentication or user interaction is required, and successful exploitation grants full access to the main server and every agent machine.

CVSS severity10.0
Critical
EPSS probability3.19%
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 FactoryTalk AssetCentre 10.00 and earlier allows remote attackers to take over servers and agents. .NET Remoting endpoints deserialize attacker-controlled objects without sufficiently validating the resulting object graph. No authentication or user interaction is required, and successful exploitation grants full access to the main server and every agent machine.

The record

CVE
CVE-2021-27460
Published
Mar 23, 2022
Updated
Apr 16, 2025
Vendor
Rockwell Automation
Product
FactoryTalk AssetCentre
Classifications
CWE-502, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 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=unspecified <=v10.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rockwell Automation · FactoryTalk AssetCentreversion=unspecified <=v10.00

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0Rockwell AutomationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

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Technologies

Your stack

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Your stack

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