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NVD / CVE Program· CNA mitre

CVE-2019-20755: Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user.

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.50% (FIRST EPSS).
  • 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.
  • According to the record, no fixed version is available yet.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects D6220 before 1.0.0.46, D6400 before 1.0.0.80, D7000v2 before 1.0.0.51, D8500 before 1.0.3.42, DGN2200v1 before 1.0.0.58, DGN2200B before 1.0.0.58, JNDR3000 before 1.0.0.24, RBW30 before 2.1.4.16, R6250 before 1.0.4.26, R6300v2 before 1.0.4.28, R6400 before 1.0.1.42, R6400v2 before 1.0.2.56, R6700 before 1.0.1.46, R6900 before 1.0.1.46, R7000 before 1.0.9.32, R6900P before 1.3.1.44, R7100LG before 1.0.0.46, R7300DST before 1.0.0.68, R7000P before 1.3.1.44, R7900 before 1.0.2.16, R8000P before 1.4.0.10, R7900P before 1.4.0.10, R8300 before 1.0.2.122, R8500 before 1.0.2.122, R8000 before 1.0.4.18, WNDR3400v3 before 1.0.1.22, WNDR4500v2 before 1.0.0.72, WNR3500Lv2 before 1.2.0.54, WN3100RP before 1.0.0.20, and WN2500RPv2 before 1.0.1.54.

MediumCVSS 6.8 · v3.1—No exploit No fix recorded
Published
Apr 16, 2020
Updated
Jun 16, 2026
EPSS
0.5% · 43th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-20755

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
netgeard6220 firmware
netgeard6220
netgeard6400 firmware
netgeard6400
netgeard7000 firmware
netgeard7000
netgeard8500 firmware
netgeard8500
netgeardgn2200 firmware
netgeardgn2200
netgeardgn2200b firmware
netgeardgn2200b

and 46 more

Affected versions

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

  • netgear d6220 firmwarebefore 1.0.0.46
  • netgear d6400 firmwarebefore 1.0.0.80
  • netgear d7000 firmwarebefore 1.0.0.51
  • netgear d8500 firmwarebefore 1.0.3.42
  • netgear dgn2200 firmwarebefore 1.0.0.58
  • netgear dgn2200b firmwarebefore 1.0.0.58
  • netgear jndr3000 firmwarebefore 1.0.0.24
  • netgear r6250 firmwarebefore 1.0.4.26
  • netgear r6300 firmwarebefore 1.0.4.28
  • netgear r6400 firmwarebefore 1.0.1.42
  • netgear r6400 firmwarebefore 1.0.2.56
  • netgear r6700 firmwarebefore 1.0.1.46
  • netgear r6900 firmwarebefore 1.0.1.46
  • netgear r6900p firmwarebefore 1.3.1.44
  • netgear r7000 firmwarebefore 1.0.9.32
  • netgear r7000p firmwarebefore 1.3.1.44
  • netgear r7100lg firmwarebefore 1.0.0.46
  • netgear r7300dst firmwarebefore 1.0.0.68
  • netgear r7900 firmwarebefore 1.0.2.16
  • netgear r7900p firmwarebefore 1.4.0.10

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-6277NETGEAR R6250 before 1.0.4.6.Beta, R6400 before 1.0.1.18.Beta, R6700 before 1.0.1.14.Beta, R6900, R7000 before 1.0.7.6.Beta, R7100LG before KEV
    95Now
  • CVE-2021-45638Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker.
    39Monitor
  • CVE-2021-45610Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker.
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2019-20734Apr 16, 2020 · Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker.
    35Monitor
  • ← EarlierCVE-2019-20737Apr 16, 2020 · Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker.
    26Monitor
  • Later →CVE-2017-18850Apr 20, 2020 · Certain NETGEAR devices are affected by authentication bypass.
    33Monitor

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.

No history yet (it accumulates with the daily EPSS job).

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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.

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