How severe is CVE-2018-11420?

CVE-2018-11420 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-2018-11420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11420?

CVE-2018-11420 primarily affects Moxa Oncell G3150-hspa Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-11420?

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-2018-11420 published?

CVE-2018-11420 was published on 2019-07-03 and last updated on 2026-06-17.

CVE-2018-11420

CVE-2018-11420 is a critical-severity vulnerability in Moxa Oncell G3150-hspa 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Moxa Oncell G3150-hspa Firmware
Published: 2019-07-03
Last modified: 2026-06-17

Description

There is Memory corruption in the web interface of Moxa OnCell G3100-HSPA Series version 1.5 Build 17042015 and prio,r a different vulnerability than CVE-2018-11423.

Frequently asked questions

What is CVE-2018-11420?: There is Memory corruption in the web interface of Moxa OnCell G3100-HSPA Series version 1.5 Build 17042015 and prio,r a different vulnerability than CVE-2018-11423.
How severe is CVE-2018-11420?: CVE-2018-11420 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-2018-11420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11420?: CVE-2018-11420 primarily affects Moxa Oncell G3150-hspa Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-11420?: 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-2018-11420 published?: CVE-2018-11420 was published on 2019-07-03 and last updated on 2026-06-17.

References

https://github.com/klsecservices/Advisories/blob/master/KL-MOXA-2018-101.md

Affected products (2)

cpe:2.3:o:moxa:oncell_g3150-hspa_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:oncell_g3150-hspa-t_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Moxa Oncell G3150-hspa Firmware

CVE-2018-11422 — Critical (CVSS 9.8): Moxa OnCell G3100-HSPA Series version 1.6 Build 17100315 and prior use a proprietary configuration protocol that does…
CVE-2018-11421 — Critical (CVSS 9.8): Moxa OnCell G3100-HSPA Series version 1.6 Build 17100315 and prior use a proprietary monitoring protocol that does not…
CVE-2018-11426 — Critical (CVSS 9.8): A weak Cookie parameter is used in the web application of Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and…
CVE-2018-5455 — Critical (CVSS 9.8): A Reliance on Cookies without Validation and Integrity Checking issue was discovered in Moxa OnCell G3100-HSPA Series…
CVE-2018-11427 — High (CVSS 8.8): CSRF tokens are not used in the web application of Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and prior,…
CVE-2018-11423 — High (CVSS 7.5): There is Memory corruption in the web interface Moxa OnCell G3100-HSPA Series version 1.6 Build 17100315 and prior,…

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