How severe is CVE-2021-20719?

CVE-2021-20719 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-20719 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20719?

CVE-2021-20719 affects Nippon-antenna Rfntps Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20719?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-20719 published?

CVE-2021-20719 was published on 2021-05-20 and last updated on 2026-06-17.

CVE-2021-20719

CVE-2021-20719 is a medium-severity vulnerability in Nippon-antenna Rfntps Firmware with a CVSS 3.x base score of 6.8. 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-78.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v2: 7.7
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Nippon-antenna Rfntps Firmware
Published: 2021-05-20
Last modified: 2026-06-17

Description

RFNTPS firmware versions System_01000004 and earlier, and Web_01000004 and earlier allow an attacker on the same network segment to execute arbitrary OS commands with a root privilege via unspecified vectors.

Frequently asked questions

What is CVE-2021-20719?: RFNTPS firmware versions System_01000004 and earlier, and Web_01000004 and earlier allow an attacker on the same network segment to execute arbitrary OS commands with a root privilege via unspecified vectors.
How severe is CVE-2021-20719?: CVE-2021-20719 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-20719 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20719?: CVE-2021-20719 affects Nippon-antenna Rfntps Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20719?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20719 published?: CVE-2021-20719 was published on 2021-05-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:nippon-antenna:rfntps_firmware:*:*:*:*:*:*:*:*

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