Security readout for executives and security teams
Plain-English summary
CVE-2019-20758 is a high-severity post-authentication buffer overflow affecting NETGEAR R7000 devices running firmware before 1.0.9.42. A successful attack could compromise confidentiality, integrity, and availability, but the source bundle indicates authentication and user interaction are required.
Executive priority
Treat this as a high-priority hygiene and exposure-reduction item for any NETGEAR R7000 still in service. It is not currently supported by the bundle as actively exploited, but outdated router firmware can create broad business risk.
Technical view
The CVE describes a buffer overflow in NETGEAR R7000 firmware before 1.0.9.42. The CVSS 3.0 vector is 7.4 high, with adjacent attack vector, low complexity, low privileges, user interaction required, unchanged scope, and high impact to confidentiality, integrity, and availability.
Likely exposure
Exposure is most likely in environments still operating NETGEAR R7000 routers below firmware 1.0.9.42. The provided sources do not identify other affected products, services, CPEs, or deployment-specific exposure paths.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. Risk remains meaningful because the issue is a memory corruption flaw with high impact, but exploitation is constrained by authentication, adjacent access, and user interaction per CVSS.
Researcher notes
Evidence is narrow: the CVE text and NETGEAR advisory identify R7000 firmware before 1.0.9.42 and a post-authentication buffer overflow. No CWE, CPE, exploit details, or broader affected product list are supplied in the bundle.
Mitigation direction
- Upgrade NETGEAR R7000 firmware to 1.0.9.42 or later where applicable.
- Review the NETGEAR advisory for current vendor guidance and supported firmware paths.
- Restrict authenticated access to trusted administrators only.
- Reduce local or adjacent network exposure where practical.
Validation and detection
- Inventory NETGEAR R7000 devices and record firmware versions.
- Confirm no R7000 device remains below firmware 1.0.9.42.
- Check whether device access is limited to trusted users.
- Track remediation status against the NETGEAR advisory reference.
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-2019-20758 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:U/UI:R
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:L/S:U/UI:R1.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.4HighVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:U/UI:R
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000060641/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-R7000-PSV-2018-0377CVE 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.