How severe is CVE-2020-10920?

CVE-2020-10920 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-10920 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10920?

CVE-2020-10920 affects Automationdirect C-more Hmi Ea9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-10920?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-10920 published?

CVE-2020-10920 was published on 2020-07-23 and last updated on 2026-06-17.

CVE-2020-10920

CVE-2020-10920 is a critical-severity vulnerability in Automationdirect C-more Hmi Ea9 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Automationdirect C-more Hmi Ea9 Firmware
Published: 2020-07-23
Last modified: 2026-06-17

Description

This vulnerability allows remote attackers to execute arbitrary code 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 control service, which listens on TCP port 9999 by default. The issue results from the lack of authentication prior to allowing alterations to the system configuration. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-10493.

Frequently asked questions

What is CVE-2020-10920?: This vulnerability allows remote attackers to execute arbitrary code 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 control service, which listens on TCP port 9999 by default. The issue results from the lack of authentication prior to allowing alterations to the system configuration. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-10493.
How severe is CVE-2020-10920?: CVE-2020-10920 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-10920 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10920?: CVE-2020-10920 affects Automationdirect C-more Hmi Ea9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-10920?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-10920 published?: CVE-2020-10920 was published on 2020-07-23 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-20-808/

Affected products (1)

cpe:2.3:o:automationdirect:c-more_hmi_ea9_firmware:6.52:*:*:*:*:*:*:*

More vulnerabilities in Automationdirect C-more Hmi Ea9 Firmware

CVE-2020-10921 — Critical (CVSS 9.8): This vulnerability allows remote attackers to issue commands on affected installations of C-MORE HMI EA9 Firmware…
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CVE-2020-10919 — Medium (CVSS 5.9): This vulnerability allows remote attackers to disclose sensitive information on affected installations of C-MORE HMI…

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