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CVE-2017-18840· NVD / CVE Program· CNA mitre

Certain NETGEAR devices are affected by denial of service.

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.

MediumCVSS 6.2 · v3.1—No exploit No fix recorded
Published
Apr 20, 2020
Updated
Jun 16, 2026
EPSS
0.3% · 20th percentile
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Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CNA vs NVD score

NVD
6.2
CNA · mitre
6.2
agree

CVSS:3.0/AC:L/AV:L/A:H/C:N/I:N/PR:N/S:U/UI:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
netgearm4300-28g firmware
netgearm4300-28g
netgearm4300-52g firmware
netgearm4300-52g
netgearm4300-28g-poe\+ firmware
netgearm4300-28g-poe\+
netgearm4300-52g-poe\+ firmware
netgearm4300-52g-poe\+
netgearm4300-8x8f firmware
netgearm4300-8x8f
netgearm4300-12x12f firmware
netgearm4300-12x12f

and 8 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netgear m4200 firmwarebefore 12.0.2.15
  • netgear m4300-12x12f firmwarebefore 12.0.2.15
  • netgear m4300-24x firmwarebefore 12.0.2.15
  • netgear m4300-24x24f firmwarebefore 12.0.2.15
  • netgear m4300-28g firmwarebefore 12.0.2.15
  • netgear m4300-28g-poe+ firmwarebefore 12.0.2.15
  • netgear m4300-48x firmwarebefore 12.0.2.15
  • netgear m4300-52g firmwarebefore 12.0.2.15
  • netgear m4300-52g-poe+ firmwarebefore 12.0.2.15
  • netgear m4300-8x8f firmwarebefore 12.0.2.15

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-18837Certain NETGEAR devices are affected by vertical privilege escalation.
    31Monitor
  • CVE-2017-18830Certain NETGEAR devices are affected by vertical privilege escalation.
    31Monitor
  • CVE-2017-18829Certain NETGEAR devices are affected by vertical privilege escalation.
    31Monitor
  • CVE-2017-18826Certain NETGEAR devices are affected by vertical privilege escalation.
    31Monitor
  • CVE-2017-18822Certain NETGEAR devices are affected by vertical privilege escalation.
    31Monitor
  • CVE-2017-18838Certain NETGEAR devices are affected by privilege escalation.
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records