Security readout for executives and security teams
Plain-English summary
Some NETGEAR routers and gateways can let an unauthenticated adjacent-network attacker run system commands. That can compromise device confidentiality and integrity. Exposure is limited to listed models and firmware older than fixed versions, but stale edge-device firmware deserves prompt attention.
Executive priority
Prioritize remediation where these routers protect business networks or provide Wi-Fi access. The issue is high severity and requires no authentication, but the provided evidence points to adjacent-network exposure rather than confirmed active exploitation.
Technical view
CVE-2021-38529 is a pre-authentication command injection issue affecting NETGEAR D7800 before 1.0.1.56, R7800 before 1.0.2.68, and R8900/R9000 before 1.0.4.26. CVSS 3.1 is 8.3 with adjacent attack vector, low complexity, no privileges, no user interaction, high confidentiality and integrity impact.
Likely exposure
Organizations may be exposed if they still operate the named NETGEAR models on firmware below the fixed versions. The CVSS vector indicates adjacent-network reachability, so validate internal, Wi-Fi, and local network placement rather than assuming internet exposure.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Treat this as a serious pre-auth router vulnerability, but do not claim known exploitation from the provided sources.
Researcher notes
Key uncertainty is operational detail: the bundle names products and fixed-version thresholds but does not provide CWE, root-cause detail, exploit status, or full vendor mitigation text. Avoid offensive validation; focus on version-based exposure confirmation.
Mitigation direction
- Inventory NETGEAR D7800, R7800, R8900, and R9000 devices.
- Update affected devices to the fixed firmware versions or later.
- Check the NETGEAR advisory for model-specific upgrade guidance.
- Replace devices that cannot run fixed firmware.
- Limit management and local network access while remediation is pending.
Validation and detection
- Confirm each device model and firmware version from administrative records.
- Compare versions against the affected thresholds in the CVE description.
- Verify upgraded devices report fixed firmware versions after maintenance.
- Document any unreachable, unsupported, or unmanaged devices for follow-up.
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-2021-38529 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
- 8.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:L/AV:A/A:L/C:H/I:H/PR:N/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:3.1/AC:L/AV:A/A:L/C:H/I:H/PR:N/S:U/UI:N2.85.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.3HighVector: CVSS:3.1/AC:L/AV:A/A:L/C:H/I:H/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000063765/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-and-Gateways-PSV-2018-0616CVE 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.