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CVE-2018-21150· 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 D7800 before 1.0.1.34, DM200 before 1.0.0.50, R6100 before 1.0.1.22, R7500 before 1.0.0.122, R7500v2 before 1.0.3.26, R7800 before 1.0.2.42, R8900 before 1.0.3.10, R9000 before 1.0.3.10, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.54, WNDR4500v3 before 1.0.0.54, and WNR2000v5 before 1.0.0.64.

MediumCVSS 6.8 · v3.1—No exploit No fix recorded
Published
Apr 22, 2020
Updated
Jun 16, 2026
EPSS
0.6% · 46th percentile
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Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CNA vs NVD score

NVD
6.8
CNA · mitre
6.8
agree

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
netgeard7800 firmware
netgeard7800
netgeardm200 firmware
netgeardm200
netgearr6100 firmware
netgearr6100
netgearr7500 firmware
netgearr7500
netgearr7800 firmware
netgearr7800
netgearr8900 firmware
netgearr8900

and 10 more

Affected versions

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

  • netgear d7800 firmwarebefore 1.0.1.34
  • netgear dm200 firmwarebefore 1.0.0.50
  • netgear r6100 firmwarebefore 1.0.1.22
  • netgear r7500 firmwarebefore 1.0.0.122
  • netgear r7500 firmwarebefore 1.0.3.26
  • netgear r7800 firmwarebefore 1.0.2.42
  • netgear r8900 firmwarebefore 1.0.3.10
  • netgear r9000 firmwarebefore 1.0.3.10
  • netgear wndr3700 firmwarebefore 1.0.2.96
  • netgear wndr4300 firmwarebefore 1.0.2.98
  • netgear wndr4300 firmwarebefore 1.0.0.54
  • netgear wndr4500 firmwarebefore 1.0.0.54
  • netgear wnr2000 firmwarebefore 1.0.0.64

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-45618Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.
    40Plan
  • CVE-2021-45608Certain D-Link, Edimax, NETGEAR, TP-Link, Tenda, and Western Digital devices are affected by an integer overflow by an unauthenticated attac
    40Plan
  • CVE-2021-45658Certain NETGEAR devices are affected by server-side injection.
    39Monitor
  • CVE-2021-38529Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.
    39Monitor
  • CVE-2018-21153Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker.
    39Monitor
  • CVE-2018-21161Certain NETGEAR devices are affected by incorrect configuration of security settings.
    39Monitor

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 on the same network segment 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
Adjacent
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:A/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