CVE-2021-27462
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA deserialization vulnerability exists in how the AosService.rem service in Rockwell Automation FactoryTalk AssetCentre v10.00 and earlier verifies serialized data. This vulnerability may allow a remote, unauthenticated attacker to execute arbitrary commands in FactoryTalk AssetCentre.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA deserialization vulnerability exists in the AosService.rem service of Rockwell Automation FactoryTalk AssetCentre v10.00 and earlier. The service improperly validates serialized data, allowing a remote unauthenticated attacker to achieve arbitrary command execution on the affected system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 10.00CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify FactoryTalk AssetCentre installationCheck for FactoryTalk AssetCentre installation directory, typically under C:\Program Files\Rockwell Software\ or review installed programs via Windows Control Panel > Programs and FeaturesAffected if FactoryTalk AssetCentre is present on the system
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Determine installed versionLocate the version information in the installation directory, typically in version.txt, about dialog, or check the Windows registry under HKLM\SOFTWARE\Rockwell Software\AssetCentre for the Version keyAffected if The installed version is 10.00 or earlier (any version <= 10.00)
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Identify AosService.rem service statusOpen Windows Services (services.msc) and locate the 'AosService' service, or run 'sc query aoservice' from command prompt to check if the service exists and its stateAffected if The AosService service is installed and running
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Check network exposure of the serviceRun 'netstat -ano | findstr' looking for ports associated with FactoryTalk AssetCentre (typically port 8080, 8443, or custom remoting ports), or review firewall rules for inbound allow rules targeting the serviceAffected if The AosService.rem listener is bound to a network-accessible IP and port, allowing remote connections
The environment is affected if FactoryTalk AssetCentre version 10.00 or earlier is installed with the AosService.rem service running and exposed to the network.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedApply vendor-provided patches or updates to FactoryTalk AssetCentre. If patches are unavailable, restrict network access to the service and implement additional network segmentation to limit exposure.
FactoryTalk AssetCentre version 10.00 or later with security fixes (contact Rockwell for exact patched release)
- 1. Identify the current installed version of FactoryTalk AssetCentre by checking the application's 'About' section or Add/Remove Programs
- 2. Contact Rockwell Automation technical support or visit their Security Advisories page to obtain the latest security update
- 3. Download the patched version of FactoryTalk AssetCentre (version 10.00 or later with security fixes)
- 4. Before applying the update, back up the FactoryTalk AssetCentre database and configuration files
- 5. Apply the security update following the installation instructions provided by Rockwell Automation
- 6. Verify the update was successful by checking the new version number
- 7. Restart the FactoryTalk AssetCentre services to ensure the patch takes effect
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation6.0 h
- Testing12.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-27462 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-27462 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data