Security readout for executives and security teams
Plain-English summary
This CVE affects NETGEAR R6020 firmware 1.0.0.48. An authenticated administrator could abuse the router setup interface to run operating-system commands through the NTP server field. It is serious for exposed or weakly protected admin interfaces, but the source bundle does not show active exploitation or a named vendor fix.
Executive priority
Prioritize this if R6020 routers remain in production or management interfaces are exposed. Otherwise, handle through network-device hygiene: inventory, firmware review, and administrative access control.
Technical view
setup.cgi on NETGEAR R6020 1.0.0.48 insufficiently handles shell metacharacters in the ntp_server parameter, allowing an admin user to execute arbitrary shell commands. The record provides no CVSS score, CWE, patch version, or broader affected-version range.
Likely exposure
Exposure is likely limited to organizations still operating NETGEAR R6020 devices on firmware 1.0.0.48, especially where administrative access is reachable beyond a tightly controlled management network.
Exploitation context
The vulnerability is publicly described, but the bundle does not cite CISA KEV listing, observed exploitation, or public mass exploitation. The cited behavior requires administrative access, so credential compromise or exposed management access would materially increase risk.
Researcher notes
Evidence is narrow: one CVE record and a public write-up describing command execution in setup.cgi through ntp_server. No official patch, CVSS, CWE, or affected-version range is present in the supplied sources.
Mitigation direction
- Identify any NETGEAR R6020 devices and their firmware versions.
- Check NETGEAR support guidance for R6020 firmware updates or advisories.
- Restrict router administration to trusted management networks only.
- Disable remote administration where it is enabled and not required.
- Use strong, unique administrator credentials and rotate exposed passwords.
Validation and detection
- Confirm whether any R6020 device runs firmware 1.0.0.48.
- Verify the admin interface is not internet-facing.
- Review configuration history for unexpected NTP server changes.
- Check device logs for unusual administrator activity.
- Document any compensating controls around router management access.
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-2021-41383 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://j-o-e-l-s.github.io/2021/09/15/Hacking-The-Netgear-R6020.htmlCVE reference · x_refsource_MISC
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.