Security readout for executives and security teams
Plain-English summary
This flaw lets an authenticated user inject operating-system commands on certain NETGEAR XR500 and XR700 routers running older firmware. That can compromise confidentiality and integrity of the device. The issue is high urgency where these models are still deployed and management access is reachable by users who should not administer the router.
Executive priority
Prioritize remediation for any affected device that supports business connectivity or is reachable by non-administrators. The issue can enable serious device compromise, but current supplied evidence does not show active exploitation.
Technical view
CVE-2019-20655 is a post-authentication command injection issue affecting NETGEAR XR500 before 2.3.2.56 and XR700 before 1.0.1.20. The supplied CVSS v3.0 vector is AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L, indicating low complexity, low privileges required, no user interaction, and high confidentiality and integrity impact.
Likely exposure
Exposure is limited to NETGEAR XR500 and XR700 devices on firmware earlier than the fixed versions. Risk increases where management access is broadly reachable or shared with untrusted authenticated users.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires authentication according to the CVE description, and the supplied CVSS vector lists local attack vector and low privileges required.
Researcher notes
The affected product data in the bundle is generic, but the description names XR500 and XR700 with fixed firmware thresholds. No CWE is supplied. Validate against vendor firmware records and avoid assuming other NETGEAR models are affected from this bundle alone.
Mitigation direction
- Upgrade XR500 firmware to 2.3.2.56 or later.
- Upgrade XR700 firmware to 1.0.1.20 or later.
- Restrict router management access to trusted administrators only.
- Review NETGEAR advisory guidance before making production changes.
Validation and detection
- Inventory environments for NETGEAR XR500 and XR700 devices.
- Confirm firmware versions against the affected thresholds.
- Verify management interfaces are not exposed to untrusted users.
- Review configured administrative users for unexpected accounts.
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-2019-20655 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
- 7.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:L/A:L/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:L/AV:L/A:L/C:H/I:H/PR:L/S:U/UI:N1.85.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.3HighVector: CVSS:3.0/AC:L/AV:L/A:L/C:H/I:H/PR:L/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061484/Security-Advisory-for-Post-Authentication-Command-Injection-on-XR500-and-XR700-PSV-2019-0026CVE 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.