CVE-2019-20767

Authenticated memory corruption via stack buffer overflow

Published Apr 15, 2020 · Updated Aug 5, 2024

Stack-based buffer overflow in NETGEAR router firmware allows remote authenticated users to corrupt memory over an adjacent network. Affected firmware is before 1.0.0.60 on D6100; 1.0.0.75 on D3600 and D6000; 1.0.4.26 on R8900 and R9000; 1.0.2.52 on R7800; 1.0.0.58 on WNDR4300v2 and WNDR4500v3; 1.0.2.104 on WNDR4300; 1.0.2.102 on WNDR3700v4; and 1.0.0.66 on WNR2000v5, but NETGEAR has not published the affected interface, input field, or unsafe copy operation. High-privilege authentication and adjacent-network access are required; the overflow can expose or alter device data and interrupt service.

CVSS severity6.8
Medium
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in NETGEAR router firmware allows remote authenticated users to corrupt memory over an adjacent network. Affected firmware is before 1.0.0.60 on D6100; 1.0.0.75 on D3600 and D6000; 1.0.4.26 on R8900 and R9000; 1.0.2.52 on R7800; 1.0.0.58 on WNDR4300v2 and WNDR4500v3; 1.0.2.104 on WNDR4300; 1.0.2.102 on WNDR3700v4; and 1.0.0.66 on WNR2000v5, but NETGEAR has not published the affected interface, input field, or unsafe copy operation. High-privilege authentication and adjacent-network access are required; the overflow can expose or alter device data and interrupt service.

The record

CVE
CVE-2019-20767
Published
Apr 15, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NETGEARCVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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