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CVE-2018-21163· NVD / CVE Program· CNA mitre

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user.

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects DGN2200Bv4 before 1.0.0.102, DGN2200v4 before 1.0.0.102, EX3700 before 1.0.0.70, EX3800 before 1.0.0.70, EX6000 before 1.0.0.30, EX6100 before 1.0.2.22, EX6120 before 1.0.0.40, EX6130 before 1.0.0.22, EX6150 before 1.0.0.38, EX6200 before 1.0.3.86, EX7000 before 1.0.0.64, R6300v2 before 1.0.4.22, R6900P before 1.3.0.18, R7000P before 1.3.0.18, R7300DST before 1.0.0.62, R7900P before 1.3.0.10, R8000 before 1.0.4.12, R8000P before 1.3.0.10, WN2500RPv2 before 1.0.1.52, and WNDR3400v3 before 1.0.1.18.

HighCVSS 7.2 · v3.1—No exploit No fix recorded
Published
Apr 23, 2020
Updated
Jun 16, 2026
EPSS
1.1% · 64th percentile
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JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

CNA vs NVD score

NVD
7.2
CNA · mitre
6.8
0.4 point gap

CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/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
netgeardgn2200b firmware
netgeardgn2200b
netgeardgn2200 firmware
netgeardgn2200
netgearex3700 firmware
netgearex3700
netgearex3800 firmware
netgearex3800
netgearex6000 firmware
netgearex6000
netgearex6100 firmware
netgearex6100

and 28 more

Affected versions

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

  • netgear dgn2200 firmwarebefore 1.0.0.102
  • netgear dgn2200b firmwarebefore 1.0.0.102
  • netgear ex3700 firmwarebefore 1.0.0.70
  • netgear ex3800 firmwarebefore 1.0.0.70
  • netgear ex6000 firmwarebefore 1.0.0.30
  • netgear ex6100 firmwarebefore 1.0.2.22
  • netgear ex6120 firmwarebefore 1.0.0.40
  • netgear ex6130 firmwarebefore 1.0.0.22
  • netgear ex6150 firmwarebefore 1.0.0.38
  • netgear ex6200 firmwarebefore 1.0.3.86
  • netgear ex7000 firmwarebefore 1.0.0.64
  • netgear r6300 firmwarebefore 1.0.4.22
  • netgear r6900p firmwarebefore 1.3.0.18
  • netgear r7000p firmwarebefore 1.3.0.18
  • netgear r7300dst firmwarebefore 1.0.0.62
  • netgear r7900p firmwarebefore 1.3.0.10
  • netgear r8000 firmwarebefore 1.0.4.12
  • netgear r8000p firmwarebefore 1.3.0.10
  • netgear wn2500rp firmwarebefore 1.0.1.52
  • netgear wndr3400 firmwarebefore 1.0.1.18

Same product

netgear: all records

Other highest-scoring records for the same primary product.

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

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

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