Security readout for executives and security teams
Plain-English summary
This issue lets a logged-in user inject operating-system commands on specific NETGEAR routers and gateways. The listed impact is high because successful exploitation can compromise confidentiality, integrity, and availability. It is narrower than an internet-wide unauthenticated bug because the CVSS vector requires adjacent network access and low privileges.
Executive priority
Treat this as a high-priority remediation for any listed NETGEAR devices still in service, especially in environments where router compromise would disrupt operations or expose sensitive traffic. The scope is specific, so inventory and firmware verification should be the first management action.
Technical view
CVE-2019-20708 is a post-authentication command injection affecting NETGEAR D3600 before 1.0.0.76, D6000 before 1.0.0.76, and XR500 before 2.3.2.32. CVSS 3.0 is 7.1 with AV:A, AC:H, PR:L, UI:N, and high C/I/A impact.
Likely exposure
Organizations are exposed if they operate the listed NETGEAR D3600, D6000, or XR500 devices below the fixed firmware versions. Exposure is most relevant where an attacker can reach the device from an adjacent network and obtain or already has low-privileged authenticated access.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not listed as KEV in the bundle. The vulnerability is not described as unauthenticated; exploitation requires authenticated access and adjacent-network reachability, with high attack complexity according to the CVSS vector.
Researcher notes
The bundle provides affected models, fixed version thresholds, and CVSS vector but no CWE, proof-of-concept details, or exploitation evidence. Analysis should stay focused on firmware/version exposure and authenticated adjacent-network attack prerequisites. Do not assume other NETGEAR models are affected from this record alone.
Mitigation direction
- Update D3600 and D6000 firmware to 1.0.0.76 or later.
- Update XR500 firmware to 2.3.2.32 or later.
- Review the NETGEAR advisory for device-specific firmware guidance.
- Restrict authenticated device administration to trusted users and networks.
- Replace affected devices if fixed firmware cannot be applied.
Validation and detection
- Inventory NETGEAR D3600, D6000, and XR500 devices in use.
- Compare installed firmware against the affected version thresholds.
- Confirm administrative access is limited to expected trusted users.
- Check the NETGEAR advisory for any newer vendor guidance.
- Document devices that cannot be updated and track replacement plans.
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-2019-20708 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
- 7.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:H/AV:A/A:H/C:H/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:H/AV:A/A:H/C:H/I:H/PR:L/S:U/UI:N1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.1HighVector: CVSS:3.0/AC:H/AV:A/A:H/C:H/I:H/PR:L/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061221/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-Gateways-PSV-2018-0340CVE 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.