CVE-2021-27474Network attack vector

Unauthenticated data modification via unrestricted IIS remoting functions

Published Mar 23, 2022 · Updated Apr 16, 2025

Improper access control in Rockwell Automation FactoryTalk AssetCentre 10.00 and earlier allows remote attackers to modify sensitive data. The IIS remoting services allow unrestricted calls to functions that operate on sensitive application data. Network access to the remoting endpoints is sufficient; no authentication or user interaction is required, and successful requests can alter stored information.

CVSS severity10.0
Critical
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Rockwell Automation FactoryTalk AssetCentre 10.00 and earlier allows remote attackers to modify sensitive data. The IIS remoting services allow unrestricted calls to functions that operate on sensitive application data. Network access to the remoting endpoints is sufficient; no authentication or user interaction is required, and successful requests can alter stored information.

The record

CVE
CVE-2021-27474
Published
Mar 23, 2022
Updated
Apr 16, 2025
Vendor
Rockwell Automation
Product
FactoryTalk AssetCentre
Classifications
CWE-676, T1565.001, T1190
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 NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
10.0ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/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-676Use of Potentially Dangerous Function
T1565.001Stored Data Manipulation
T1190Exploit Public-Facing Application

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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