Security readout for executives and security teams
Plain-English summary
CVE-2019-20682 is a high-severity NETGEAR router and gateway flaw. An unauthenticated attacker on an adjacent network could trigger a stack-based buffer overflow, risking device compromise or outage. The source bundle lists fixed firmware thresholds for affected models.
Executive priority
Prioritize remediation for business networks still using the listed NETGEAR devices. The risk is high where outdated firmware remains, especially for branch, small-office, or remote-site routers that may be overlooked in normal patch cycles.
Technical view
The CVE describes a pre-authentication stack-based buffer overflow affecting multiple NETGEAR D, JR, PR, R, WNR, and XR router or gateway models before specified firmware versions. CVSS 3.0 is 8.8 with adjacent-network attack vector, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where listed NETGEAR devices remain on firmware older than the fixed versions and are reachable from adjacent local networks.
Exploitation context
The bundle does not include CISA KEV status or a cited source confirming active exploitation. Treat as serious because it is unauthenticated and pre-authentication, but do not assume known exploitation from the provided evidence.
Researcher notes
The source bundle provides affected model/version thresholds and CVSS data, but no exploit details, CWE mapping, or active exploitation confirmation. Analysis should stay bounded to adjacent-network unauthenticated pre-auth stack overflow exposure.
Mitigation direction
- Inventory affected NETGEAR models listed in the CVE description.
- Upgrade affected devices to the listed fixed firmware versions or later.
- Use the NETGEAR advisory to confirm model-specific firmware guidance.
- Replace devices that cannot be brought to a supported fixed version.
Validation and detection
- Compare each device model and firmware version against the CVE affected-version list.
- Confirm updated firmware is at or above the fixed version threshold.
- Verify asset records include NETGEAR model, firmware, and update date.
- Check the NETGEAR advisory for any additional model-specific instructions.
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-2019-20682 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
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/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:N/S:U/UI:N2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061457/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2018-0311CVE 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.