How severe is CVE-2017-18859?

CVE-2017-18859 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-18859 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18859?

CVE-2017-18859 primarily affects Netgear C6300 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-18859?

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

When was CVE-2017-18859 published?

CVE-2017-18859 was published on 2020-04-28 and last updated on 2026-06-17.

CVE-2017-18859

CVE-2017-18859 is a high-severity vulnerability in Netgear C6300 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netgear C6300 Firmware
Published: 2020-04-28
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by slowdown/stoppage. This affects C6300 before 2017-05-30, CM400 before 2017-05-30, CM700 before 2017-05-30, and CMD31T before 2017-05-30.

Frequently asked questions

What is CVE-2017-18859?: Certain NETGEAR devices are affected by slowdown/stoppage. This affects C6300 before 2017-05-30, CM400 before 2017-05-30, CM700 before 2017-05-30, and CMD31T before 2017-05-30.
How severe is CVE-2017-18859?: CVE-2017-18859 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-18859 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18859?: CVE-2017-18859 primarily affects Netgear C6300 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-18859?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-18859 published?: CVE-2017-18859 was published on 2020-04-28 and last updated on 2026-06-17.

References

https://kb.netgear.com/000038560/Security-Advisory-for-Vulnerability-on-Select-Cable-Modems-and-Gateways-PSV-2017-2165

Affected products (4)

cpe:2.3:o:netgear:c6300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:cm400_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:cm700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:cmd31t_firmware:*:*:*:*:*:*:*:*

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