Security readout for executives and security teams
Plain-English summary
CVE-2019-20761 is a command injection flaw in NETGEAR R7800 routers running firmware before 1.0.2.62. An authenticated user could cause high integrity and availability impact. This is mainly urgent for organizations still operating affected R7800 devices, especially where router administration is reachable by many users or shared networks.
Executive priority
Prioritize remediation where R7800 routers support business networks or sensitive environments. The issue is high severity but not shown as actively exploited in the supplied sources, so urgency depends on confirmed device presence and management-interface exposure.
Technical view
The CVE describes post-authentication command injection on NETGEAR R7800 devices before firmware 1.0.2.62. CVSS 3.0 is 7.6 high, with adjacent-network attack vector, low privileges required, no user interaction, low confidentiality impact, and high integrity and availability impact.
Likely exposure
Exposure is limited to NETGEAR R7800 devices running firmware before 1.0.2.62. The supplied CVSS vector indicates adjacent-network reachability and low privileges are required. Internet-facing exposure is not established by the provided sources.
Exploitation context
The provided bundle does not show CISA KEV listing or other cited evidence of active exploitation. The vulnerability is still meaningful because authenticated command injection on a router can affect network control, configuration integrity, and service availability.
Researcher notes
Evidence is sparse: the CVE description and NETGEAR advisory reference identify the affected model, version threshold, and post-authentication command injection class. The bundle provides no CWE, exploit proof, affected CPE list, or detailed fixed-version notes beyond before 1.0.2.62.
Mitigation direction
- Upgrade NETGEAR R7800 firmware to 1.0.2.62 or later per NETGEAR guidance.
- Review the NETGEAR advisory for model-specific update instructions.
- Restrict router administration access to trusted users and trusted network segments.
- Remove unverified affected devices from sensitive network paths until update status is confirmed.
Validation and detection
- Inventory NETGEAR R7800 devices and record current firmware versions.
- Confirm no R7800 device is running firmware earlier than 1.0.2.62.
- Verify administrative interfaces are not broadly reachable from untrusted network segments.
- Check change records for completed firmware updates and post-update validation.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-20761 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:L/I:H/PR:L/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:L/I:H/PR:L/S:U/UI:N2.15.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.6HighVector: CVSS:3.0/AC:L/AV:A/A:H/C:L/I:H/PR:L/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000060638/Security-Advisory-for-Post-Authentication-Command-Injection-on-R7800-PSV-2018-0383CVE 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.