Security readout for executives and security teams
Plain-English summary
CVE-2021-45672 is a stored cross-site scripting issue in multiple NETGEAR router models. An attacker with high privileges and local access could save malicious script content that later runs when another user views the affected router interface. Business urgency is moderate because exploitation conditions are constrained, but router administration interfaces are sensitive.
Executive priority
Treat this as a scheduled remediation item, not a crisis response, unless affected router admin interfaces are accessible to untrusted users. Prioritize firmware updates during normal maintenance because router compromise can affect network trust boundaries.
Technical view
The CVE describes stored XSS affecting listed NETGEAR D-series, R-series, AC-series, and RAX40 routers before specified firmware versions. CVSS 3.1 is 4.2 with local attack vector, high privileges required, user interaction required, changed scope, and low confidentiality/integrity impact. Availability impact is not indicated.
Likely exposure
Exposure is likely limited to organizations or users operating the named NETGEAR router models below the fixed firmware versions. Risk is higher where router administration is shared, weakly controlled, or reachable by untrusted local users.
Exploitation context
The bundle does not identify active exploitation, and CISA KEV status is false. The CVSS vector indicates exploitation requires local access, high privileges, and user interaction, which reduces broad internet-scale risk but does not eliminate administrative-interface abuse risk.
Researcher notes
Evidence is limited to the CVE record and NETGEAR advisory reference. No CWE is listed in the bundle. Avoid assuming remote exploitation or public exploit activity; the provided CVSS vector constrains attack conditions to local access with high privileges and user interaction.
Mitigation direction
- Upgrade affected NETGEAR routers to the listed fixed firmware versions or later.
- Review the NETGEAR advisory for model-specific firmware guidance.
- Limit router administration access to trusted administrators only.
- Replace devices if supported fixed firmware is unavailable.
Validation and detection
- Inventory NETGEAR router models and current firmware versions.
- Compare firmware against the affected version thresholds in the CVE description.
- Confirm administrative access is restricted to trusted users.
- Retest after firmware update and record the remediated version.
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-2021-45672 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
- 4.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:L/AV:L/A:N/C:L/I:L/PR:H/S:C/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:L/AV:L/A:N/C:L/I:L/PR:H/S:C/UI:R1.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.2MediumVector: CVSS:3.1/AC:L/AV:L/A:N/C:L/I:L/PR:H/S:C/UI:R
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000064075/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-PSV-2019-0244CVE 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.