CVE-2020-10921
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 · uneditedThis vulnerability allows remote attackers to issue commands on affected installations of C-MORE HMI EA9 Firmware version 6.52 touch screen panels. Authentication is not required to exploit this vulnerability. The specific flaw exists within the EA-HTTP.exe process. The issue results from the lack of authentication prior to allowing alterations to the system configuration. An attacker can leverage this vulnerability to issue commands to the physical equipment controlled by the device. Was ZDI-CAN-10482.
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 · high confidenceThis is an authentication bypass vulnerability in the EA-HTTP.exe web server process of C-MORE HMI EA9 touch screen panels running firmware version 6.52. The flaw allows remote unauthenticated attackers to issue commands and alter system configuration through the HTTP service, potentially allowing control of physical equipment connected to the HMI panel.
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= 6.52CVSS 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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Identify the HMI device modelAccess the HMI panel or its administrative interface and confirm the device is a C-MORE HMI EA9 series touch screen panel. Check the device label, web interface banner, or management console for the model designation.Affected if The device is not a C-MORE EA9 series panel.
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Check the installed firmware versionLog into the HMI panel administrative interface or check the system information page accessible via the EA-HTTP web server. Look for a firmware version field displaying the current installed version.Affected if The firmware version is exactly 6.52.
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Verify the EA-HTTP service is enabledCheck the HMI panel configuration or web server settings. Look for a service called EA-HTTP.exe or a web server configuration for the HMI panel that indicates HTTP services are active.Affected if The EA-HTTP.exe web server process is running and enabled on the device.
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Assess network exposure of the web interfaceExamine network configuration, firewall rules, or access control lists that determine which IP addresses or networks can reach the HMI web server on ports 80/443. Check if the service is bound to all interfaces or directly accessible from untrusted networks.Affected if The EA-HTTP web interface is accessible from networks outside the trusted operational technology network, without authentication barriers.
A user is affected if they operate a C-MORE EA9 HMI panel with firmware version 6.52 where the EA-HTTP web server is enabled and accessible from their 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.
From vendor dataApply vendor firmware updates when available; if no patch exists, implement network segmentation and firewall rules to restrict access to the EA-HTTP service from untrusted networks.
- Consultation4.0 h
- Implementation3.0 h
- Testing6.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-10921 — 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-2020-10921 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
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