How severe is CVE-2017-18858?

CVE-2017-18858 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-2017-18858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18858?

CVE-2017-18858 primarily affects Netgear M4200-10mg-poe+ Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-18858?

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-2017-18858 published?

CVE-2017-18858 was published on 2020-04-28 and last updated on 2026-06-17.

CVE-2017-18858

CVE-2017-18858 is a critical-severity vulnerability in Netgear M4200-10mg-poe+ 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Netgear M4200-10mg-poe+ Firmware
Published: 2020-04-28
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by command execution. This affects M4200-10MG-POE+ 12.0.2.11 and earlier, M4300-28G 12.0.2.11 and earlier, M4300-52G 12.0.2.11 and earlier, M4300-28G-POE+ 12.0.2.11 and earlier, M4300-52G-POE+ 12.0.2.11 and earlier, M4300-8X8F 12.0.2.11 and earlier, M4300-12X12F 12.0.2.11 and earlier, M4300-24X24F 12.0.2.11 and earlier, M4300-24X 12.0.2.11 and earlier, and M4300-48X 12.0.2.11 and earlier.

Frequently asked questions

What is CVE-2017-18858?: Certain NETGEAR devices are affected by command execution. This affects M4200-10MG-POE+ 12.0.2.11 and earlier, M4300-28G 12.0.2.11 and earlier, M4300-52G 12.0.2.11 and earlier, M4300-28G-POE+ 12.0.2.11 and earlier, M4300-52G-POE+ 12.0.2.11 and earlier, M4300-8X8F 12.0.2.11 and earlier, M4300-12X12F 12.0.2.11 and earlier, M4300-24X24F 12.0.2.11 and earlier, M4300-24X 12.0.2.11 and earlier, and M4300-48X 12.0.2.11 and earlier.
How severe is CVE-2017-18858?: CVE-2017-18858 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-2017-18858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18858?: CVE-2017-18858 primarily affects Netgear M4200-10mg-poe+ Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-18858?: 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-2017-18858 published?: CVE-2017-18858 was published on 2020-04-28 and last updated on 2026-06-17.

References

https://kb.netgear.com/000038655/Security-Advisory-for-Unauthenticated-Remote-Code-Execution-on-M4200-and-M4300-PSV-2017-1971

Affected products (10)

cpe:2.3:o:netgear:m4200-10mg-poe\+_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-28g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-52g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-28g-poe\+_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-52g-poe\+_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-8x8f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-12x12f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-24x24f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-24x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4300-48x_firmware:*:*:*:*:*:*:*:*

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