Security readout for executives and security teams
Plain-English summary
CVE-2019-20713 affects certain NETGEAR routers and gateways. An already authenticated user could trigger a stack-based buffer overflow, potentially compromising confidentiality, integrity, and availability of the device. The access requirement lowers broad internet urgency, but affected network edge devices should be upgraded or tightly managed.
Executive priority
Treat as a targeted infrastructure hygiene issue, not an emergency exploitation event based on available evidence. Prioritize upgrades for affected edge devices because compromise could affect network confidentiality, traffic integrity, and device availability.
Technical view
The issue is a post-authentication stack-based buffer overflow in specific NETGEAR D8500 and R-series firmware versions. CVSS 3.0 score is 6.8, with adjacent-network access, low attack complexity, high privileges required, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to the NETGEAR router and gateway models and firmware versions listed in the CVE and NETGEAR advisory. Priority assets are devices still running firmware earlier than the fixed versions, especially where administrator access is shared, weakly protected, or reachable from broad internal networks.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. The vulnerability requires authentication with high privileges and adjacent-network access, so risk depends heavily on management-plane exposure and administrator account controls.
Researcher notes
The CVE record gives affected models, fixed-version thresholds, CVSS vector, and NETGEAR advisory reference, but does not provide CWE details, root-cause internals, proof-of-concept status, or exploit telemetry. Avoid assuming exploitability beyond the authenticated stack-overflow description.
Mitigation direction
- Inventory affected NETGEAR models and record exact firmware versions.
- Upgrade each affected device to the listed fixed firmware version or later.
- Restrict router administration to trusted management networks only.
- Review administrator accounts and remove shared or unnecessary access.
- Check NETGEAR advisory for model-specific firmware guidance.
Validation and detection
- Compare device model and firmware against the CVE affected-version list.
- Confirm administrative interfaces are not exposed beyond trusted networks.
- Verify upgraded firmware versions after maintenance is complete.
- Review logs for unexpected administrative access where available.
- Track unsupported or unreachable devices as residual risk.
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-2019-20713 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/000061215/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2018-0253CVE 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.