Security readout for executives and security teams
Plain-English summary
Several NETGEAR router, gateway, and WiFi system models contain a post-authentication stack overflow. A highly privileged authenticated user could potentially compromise confidentiality, integrity, and availability on vulnerable firmware. Business urgency is moderate because exploitation requires authenticated access, but affected devices are network edge infrastructure.
Executive priority
Prioritize remediation for internet-edge, branch, and remote-office devices, especially where administrator credentials are shared or weakly controlled. Treat as moderate urgency with high potential device impact.
Technical view
CVE-2019-20747 is a stack-based buffer overflow affecting listed NETGEAR models before specified firmware versions. CVSS 3.0 is 6.8 with adjacent-network attack vector, low complexity, high privileges required, no user interaction, and high CIA impact.
Likely exposure
Exposure is limited to organizations using the listed NETGEAR models on firmware older than the fixed versions named in the CVE description and NETGEAR advisory.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The issue is post-authentication, so attacker access to a privileged device account is a key prerequisite.
Researcher notes
The bundle does not provide a CWE, vulnerable endpoint, proof of concept, or exploit telemetry. Analysis should stay at advisory level unless NETGEAR or another cited source publishes more detail.
Mitigation direction
- Inventory NETGEAR models listed in the advisory.
- Upgrade affected devices to the fixed or later firmware version.
- Restrict administrative access to trusted management networks.
- Review privileged router administrator accounts.
- Check NETGEAR guidance for model-specific remediation details.
Validation and detection
- Compare each device model and firmware version against the advisory.
- Confirm no affected model remains below the fixed version.
- Verify administrative interfaces are not broadly reachable.
- Review logs for unusual privileged administration activity.
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-2019-20747 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/000060962/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-WiFi-Systems-PSV-2018-0032CVE 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.