Security readout for executives and security teams
Plain-English summary
CVE-2019-20757 affects NETGEAR R7800 routers running firmware before 1.0.2.62. An already authenticated user can trigger command injection, potentially gaining high-impact control over router behavior. Business urgency is moderate: exploitation requires privileged access and adjacent network reach, but router compromise can affect traffic confidentiality, integrity, and availability.
Executive priority
Treat this as a scheduled but important network-edge remediation. It is not presented as actively exploited and needs privileged access, but a vulnerable router can become a high-impact pivot point if admin credentials are misused or stolen.
Technical view
The CVE describes post-authentication command injection in NETGEAR R7800 firmware before 1.0.2.62. CVSS 3.0 is 6.8 with adjacent attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high C/I/A impact. The source bundle does not identify the vulnerable parameter, endpoint, or CWE.
Likely exposure
Exposure is limited to NETGEAR R7800 devices on firmware earlier than 1.0.2.62, especially where administrative access is reachable from local or adjacent networks. The CVE affected-product metadata is incomplete, but the description and NETGEAR advisory reference identify R7800.
Exploitation context
No source in the bundle indicates active exploitation, and the CVE is not listed as KEV. The attacker must already be authenticated with high privileges and have adjacent network access, reducing broad internet risk but leaving insider, credential misuse, and compromised-admin scenarios relevant.
Researcher notes
Available public detail is sparse: no CWE, vulnerable endpoint, or proof details are provided in the source bundle. Validate exposure through firmware and access-control review. Avoid exploit attempts unless operating under an approved internal testing plan and vendor-safe methodology.
Mitigation direction
- Upgrade NETGEAR R7800 firmware to version 1.0.2.62 or later.
- Review the NETGEAR advisory for vendor-specific update guidance.
- Restrict router administration to trusted management networks only.
- Use strong, unique administrator credentials and remove unused admin access.
- Monitor for unexpected configuration changes or administrator logins.
Validation and detection
- Inventory NETGEAR R7800 devices in managed environments.
- Check each device firmware version against 1.0.2.62.
- Confirm management interfaces are not broadly reachable.
- Review available logs for unexpected administrative activity.
- Document any devices that cannot be updated immediately.
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-2019-20757 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/000060642/Security-Advisory-for-Post-Authentication-Command-Injection-on-R7800-PSV-2018-0358CVE 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.