Security readout for executives and security teams
Plain-English summary
Some NETGEAR routers, gateways, and WiFi systems have a stored cross-site scripting flaw in older firmware. Malicious script could be saved in the device interface and run when a user views it, potentially exposing or changing sensitive management data.
Executive priority
Treat as a scheduled remediation item unless affected devices manage sensitive networks or have broadly reachable admin interfaces. Patch during the next maintenance window after confirming model impact.
Technical view
CVE-2021-38538 is stored XSS affecting listed NETGEAR models before specified firmware versions. CVSS 3.1 is 6.3 with local attack vector, high complexity, no privileges, and required user interaction. The source bundle does not identify a CWE or technical injection point.
Likely exposure
Exposure is limited to organizations or homes using the named NETGEAR models on firmware older than the listed fixed versions. Highest concern is devices with reachable administrative interfaces or shared management responsibility.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Stored XSS still matters because successful abuse can persist in management UI content and affect later administrative sessions.
Researcher notes
The bundle gives model and version boundaries but not affected parameters, proof-of-concept details, or vendor-specific mitigations beyond firmware versions. Avoid assuming internet-scale exposure from the CVSS local attack vector.
Mitigation direction
- Inventory NETGEAR models named in the advisory.
- Upgrade affected devices to the listed fixed firmware version or later.
- Check NETGEAR advisory guidance before changing production devices.
- Restrict management interface access to intended administrators.
Validation and detection
- Compare device model and firmware against the affected version list.
- Confirm upgraded devices report the expected fixed firmware or later.
- Review administrative interface exposure and access controls.
- Check device management pages for unexpected saved content.
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-2021-38538 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
- Medium
- CVSS
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:H/AV:L/A:N/C:H/I:H/PR:N/S:U/UI:R
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:H/AV:L/A:N/C:H/I:H/PR:N/S:U/UI:R15.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AC:H/AV:L/A:N/C:H/I:H/PR:N/S:U/UI:R
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000063761/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-Gateways-and-WiFi-Systems-PSV-2018-0515CVE 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.