How severe is CVE-2020-28144?

CVE-2020-28144 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-2020-28144 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28144?

CVE-2020-28144 primarily affects Moxa Edr-g903 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-28144?

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-2020-28144 published?

CVE-2020-28144 was published on 2021-02-03 and last updated on 2026-06-17.

CVE-2020-28144

CVE-2020-28144 is a critical-severity vulnerability in Moxa Edr-g903 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-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Moxa Edr-g903 Firmware
Published: 2021-02-03
Last modified: 2026-06-17

Description

Certain Moxa Inc products are affected by an improper restriction of operations in EDR-G903 Series Firmware Version 5.5 or lower, EDR-G902 Series Firmware Version 5.5 or lower, and EDR-810 Series Firmware Version 5.6 or lower. Crafted requests sent to the device may allow remote arbitrary code execution.

Frequently asked questions

What is CVE-2020-28144?: Certain Moxa Inc products are affected by an improper restriction of operations in EDR-G903 Series Firmware Version 5.5 or lower, EDR-G902 Series Firmware Version 5.5 or lower, and EDR-810 Series Firmware Version 5.6 or lower. Crafted requests sent to the device may allow remote arbitrary code execution.
How severe is CVE-2020-28144?: CVE-2020-28144 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-2020-28144 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28144?: CVE-2020-28144 primarily affects Moxa Edr-g903 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-28144?: 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-2020-28144 published?: CVE-2020-28144 was published on 2021-02-03 and last updated on 2026-06-17.

References

https://www.moxa.com/en/support/support/security-advisory/edr-g903-g902-810-secure-router-vulnerability

Affected products (8)

cpe:2.3:o:moxa:edr-g903_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:edr-g903-t_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:edr-g902_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:edr-g902-t_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:edr-810-2gsfp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:edr-810-2gsfp-t_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:edr-810-vpn-2gsfp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:edr-810-vpn-2gsfp-t_firmware:*:*:*:*:*:*:*:*

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