Security readout for executives and security teams
Plain-English summary
This is a critical access-control flaw in many NETGEAR routers, gateways, and WiFi systems. Affected firmware may expose functions without proper authorization checks. The CVSS data indicates network reachability, low attack complexity, no required privileges, and high impact to confidentiality, integrity, and availability.
Executive priority
Treat this as urgent for any affected NETGEAR edge or network infrastructure. Prioritize internet-facing, remote-office, and unmanaged devices first. The business risk is loss of control over network equipment that may sit at trust boundaries.
Technical view
CVE-2021-38516 is described as missing function-level access control affecting listed NETGEAR devices before specified firmware versions. The CVSS 3.1 score is 10.0 with AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. The source bundle does not provide endpoint-level details, CWE mapping, or exploit mechanics.
Likely exposure
Exposure is likely where listed NETGEAR models remain on firmware older than the versions named in the advisory. Internet-facing administration or access from untrusted networks would increase business urgency, but the provided sources do not define exact vulnerable routes or deployment prerequisites beyond the CVSS vector.
Exploitation context
The bundle does not show active exploitation, and KEV status is false. The risk is still serious because the CVSS vector indicates remote, unauthenticated, low-complexity exploitation potential with high technical impact. No public proof-of-concept or exploitation details are included in the supplied evidence.
Researcher notes
The evidence is limited to the CVE description, CVSS vector, and NETGEAR advisory reference. Validate exposure by model and firmware version. Do not assume all NETGEAR products are affected; use only the enumerated models and version thresholds from the source.
Mitigation direction
- Identify whether any listed NETGEAR models are in use.
- Compare installed firmware against the fixed versions in the advisory.
- Update affected devices using NETGEAR’s official guidance.
- Restrict management access to trusted networks where possible.
- Retire unsupported or unpatchable affected hardware.
Validation and detection
- Inventory routers, gateways, and WiFi systems by exact model.
- Record current firmware versions from device administration interfaces.
- Match each device against the affected version list.
- Confirm successful firmware update after remediation.
- Review exposure of device management interfaces.
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-2021-38516 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
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/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:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000063780/Security-Advisory-for-Missing-Function-Level-Access-Control-on-Some-Routers-Gateways-and-WiFi-Systems-PSV-2020-0273CVE 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.