Security readout for executives and security teams
Plain-English summary
CVE-2019-20719 is a post-authentication buffer overflow affecting multiple NETGEAR routers and gateways. An attacker would need authenticated access, but successful exploitation could compromise confidentiality, integrity, and availability of the device. The available sources do not show active exploitation.
Executive priority
Prioritize remediation where affected NETGEAR devices protect business networks, remote sites, or sensitive segments. This is not currently evidenced as mass exploited, but compromise of network equipment can create serious operational and security impact.
Technical view
The CVSS 3.0 vector is 6.8 medium: adjacent network access, low attack complexity, high privileges, no user interaction, unchanged scope, and high C/I/A impact. The CVE lists specific NETGEAR models and firmware versions before fixed releases as affected.
Likely exposure
Exposure is likely limited to organizations or homes still running the listed NETGEAR models on firmware older than the named versions, especially where device administration is reachable by untrusted network users.
Exploitation context
The source bundle marks KEV as false, and no provided source cites active exploitation. The weakness requires authenticated access, which lowers broad internet risk but still matters if router credentials are shared, reused, weak, or exposed internally.
Researcher notes
The public details identify affected models and version thresholds but do not provide CWE mapping, vulnerable endpoint details, or exploit indicators. Treat this as a post-authentication device compromise risk and avoid assuming unauthenticated remote exposure from the available evidence.
Mitigation direction
- Update affected models to the firmware versions named in NETGEAR PSV-2018-0194 or later.
- Restrict router administration access to trusted management networks only.
- Review and rotate router administrator credentials where exposure is possible.
- Check NETGEAR advisory updates before assuming a device is fully remediated.
Validation and detection
- Inventory NETGEAR D-series and R-series devices against the affected model list.
- Compare running firmware versions with the fixed-version thresholds in the CVE description.
- Confirm administrative interfaces are not reachable from untrusted network segments.
- Document devices that cannot be updated and apply compensating access controls.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-20719 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N0.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061209/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-and-Gateways-PSV-2018-0194CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.