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CVE-2019-20719· NVD / CVE Program· CNA mitre

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

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects D6220 before 1.0.0.48, D6400 before 1.0.0.82, D7000v2 before 1.0.0.52, D8500 before 1.0.3.43, R6250 before 1.0.4.34, R6400 before 1.0.1.44, R6400v2 before 1.0.2.62, R7000P before 1.4.1.30, R7100LG before 1.0.0.48, R7300DST before 1.0.0.68, R7900 before 1.0.3.8, R7900P before 1.4.1.30, R8000 before 1.0.4.28, R8000P before 1.4.1.30, R8300 before 1.0.2.128, and R8500 before 1.0.2.128.

MediumCVSS 6.8 · v3.1—No exploit No fix recorded
Published
Apr 16, 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.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

VendorProduct
netgeard6220 firmware
netgeard6220
netgeard6400 firmware
netgeard6400
netgeard7000 firmware
netgeard7000
netgeard8500 firmware
netgeard8500
netgearr6250 firmware
netgearr6250
netgearr6400 firmware
netgearr6400

and 18 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 1.0.0.48
  • netgear d6400 firmwarebefore 1.0.0.82
  • netgear d7000 firmwarebefore 1.0.0.52
  • netgear d8500 firmwarebefore 1.0.3.43
  • netgear r6250 firmwarebefore 1.0.4.34
  • netgear r6400 firmwarebefore 1.0.1.44
  • netgear r6400 firmwarebefore 1.0.2.62
  • netgear r7000p firmwarebefore 1.4.1.30
  • netgear r7100lg firmwarebefore 1.0.0.48
  • netgear r7300dst firmwarebefore 1.0.0.68
  • netgear r7900 firmwarebefore 1.0.3.8
  • netgear r7900p firmwarebefore 1.4.1.30
  • netgear r8000 firmwarebefore 1.0.4.28
  • netgear r8000p firmwarebefore 1.4.1.30
  • netgear r8300 firmwarebefore 1.0.2.128
  • netgear r8500 firmwarebefore 1.0.2.128

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
  • CVE-2021-38516Certain NETGEAR devices are affected by lack of access control at the function level.
    39Monitor
  • CVE-2023-33533Netgear D6220 with Firmware Version 1.0.0.80, D8500 with Firmware Version 1.0.3.60, R6700 with Firmware Version 1.0.2.26, and R6900 with Fir
    36Monitor
  • CVE-2021-45531NETGEAR D6220 devices before 1.0.0.76 are affected by command injection by an authenticated user.
    35Monitor

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).

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-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

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

nvd-primary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
char buf[256];memcpy(buf, pkt->data, pkt->len);

Fixed

c
char buf[256];if (pkt->len > sizeof(buf)) {  return -EINVAL;}memcpy(buf, pkt->data, pkt->len);

Attack context

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

ATT&CK techniques

—

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