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CVE-2019-20754· 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 DGN2200 before 1.0.0.58, DGN2200B before 1.0.0.58, D8500 before 1.0.3.42, D7000v2 before 1.0.0.51, D6400 before 1.0.0.80, D6220 before 1.0.0.44, EX7000 before 1.0.0.66, EX6200 before 1.0.3.88, EX6150 before 1.0.0.42, EX7500 before 1.0.0.46, JNDR3000 before 1.0.0.24, R8000 before 1.0.4.18, R8500 before 1.0.2.122, R8300 before 1.0.2.122, R7900P before 1.4.0.10, R8000P before 1.4.0.10, R7900 before 1.0.2.16, R7000P before 1.3.1.44, R7300DST before 1.0.0.68, R7100LG before 1.0.0.46, R6900P before 1.3.1.44, R7000 before 1.0.9.32, R6900 before 1.0.1.46, R6700 before 1.0.1.46, R6400v2 before 1.0.2.56, R6400 before 1.0.1.42, R6300v2 before 1.0.4.28, R6250 before 1.0.4.26, WNDR4500v2 before 1.0.0.72, and WNR3500Lv2 before 1.2.0.54.

MediumCVSS 6.8 · v3.1—No exploit No fix recorded
Published
Apr 16, 2020
Updated
Jun 16, 2026
EPSS
0.5% · 41th percentile
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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.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

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

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 1.0.0.44
  • 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 ex6150 firmwarebefore 1.0.0.42
  • netgear ex6200 firmwarebefore 1.0.3.88
  • netgear ex7000 firmwarebefore 1.0.0.66
  • netgear ex7500 firmwarebefore 1.0.0.46
  • netgear jndr3000 firmwarebefore 1.0.0.24
  • netgear r6250 firmwarebefore 1.0.4.26
  • netgear r6300 firmwarebefore 1.0.4.28
  • netgear r6400 firmwarebefore 1.0.2.56
  • netgear r6400 firmwarebefore 1.0.1.42
  • 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

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-6077ping.cgi on NETGEAR DGN2200 devices with firmware through 10.0.0.50 allows remote authenticated users to execute arbitrary OS commands via sKEV
    90Now
  • CVE-2016-5649Netgear DGN2200 and DGND3700 disclose the administrator password
    46Plan
  • CVE-2024-57046A vulnerability in the Netgear DGN2200 router with firmware version v1.0.0.46 and earlier permits unauthorized individuals to bypass the aut
    36Monitor
  • CVE-2017-6366Cross-site request forgery (CSRF) vulnerability in NETGEAR DGN2200 routers with firmware 10.0.0.20 through 10.0.0.50 allows remote attackers
    36Monitor
  • CVE-2020-35785NETGEAR DGN2200v1 devices before v1.0.0.60 mishandle HTTPd authentication (aka PSV-2020-0363, PSV-2020-0364, and PSV-2020-0365).
    35Monitor
  • CVE-2019-20753Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker.
    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