How severe is CVE-2017-18840?

CVE-2017-18840 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-18840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18840?

CVE-2017-18840 primarily affects Netgear M4300-28g 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-2017-18840?

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

When was CVE-2017-18840 published?

CVE-2017-18840 was published on 2020-04-20 and last updated on 2026-06-17.

CVE-2017-18840

CVE-2017-18840 is a medium-severity vulnerability in Netgear M4300-28g Firmware with a CVSS 3.x base score of 6.2. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v2: 2.1
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Netgear M4300-28g Firmware
Published: 2020-04-20
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by denial of service. This affects M4300-28G before 12.0.2.15, M4300-52G before 12.0.2.15, M4300-28G-POE+ before 12.0.2.15, M4300-52G-POE+ before 12.0.2.15, M4300-8X8F before 12.0.2.15, M4300-12X12F before 12.0.2.15, M4300-24X24F before 12.0.2.15, M4300-24X before 12.0.2.15, M4300-48X before 12.0.2.15, and M4200 before 12.0.2.15.

Frequently asked questions

What is CVE-2017-18840?: Certain NETGEAR devices are affected by denial of service. This affects M4300-28G before 12.0.2.15, M4300-52G before 12.0.2.15, M4300-28G-POE+ before 12.0.2.15, M4300-52G-POE+ before 12.0.2.15, M4300-8X8F before 12.0.2.15, M4300-12X12F before 12.0.2.15, M4300-24X24F before 12.0.2.15, M4300-24X before 12.0.2.15, M4300-48X before 12.0.2.15, and M4200 before 12.0.2.15.
How severe is CVE-2017-18840?: CVE-2017-18840 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-18840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18840?: CVE-2017-18840 primarily affects Netgear M4300-28g 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-2017-18840?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-18840 published?: CVE-2017-18840 was published on 2020-04-20 and last updated on 2026-06-17.

References

https://kb.netgear.com/000049022/Security-Advisory-for-Denial-of-Service-Vulnerability-on-Some-Fully-Managed-Switches-PSV-2017-2005

Affected products (10)

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:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:m4200_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Netgear M4300-28g Firmware

CVE-2017-18858 — Critical (CVSS 9.8): Certain NETGEAR devices are affected by command execution. This affects M4200-10MG-POE+ 12.0.2.11 and earlier,…
CVE-2017-18837 — High (CVSS 7.8): Certain NETGEAR devices are affected by vertical privilege escalation. This affects M4300-28G before 12.0.2.15,…
CVE-2017-18830 — High (CVSS 7.8): Certain NETGEAR devices are affected by vertical privilege escalation. This affects M4300-28G before 12.0.2.15,…
CVE-2017-18829 — High (CVSS 7.8): Certain NETGEAR devices are affected by vertical privilege escalation. This affects M4300-28G before 12.0.2.15,…
CVE-2017-18826 — High (CVSS 7.8): Certain NETGEAR devices are affected by vertical privilege escalation. This affects M4300-28G before 12.0.2.15,…
CVE-2017-18822 — High (CVSS 7.8): Certain NETGEAR devices are affected by vertical privilege escalation. This affects M4300-28G before 12.0.2.15,…

All CVEs affecting Netgear M4300-28g Firmware →

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