LiveActive security incident?Get immediate response
CVE Record

CVE-2019-20667: Certain NETGEAR devices are affected by stored XSS.

Certain NETGEAR devices are affected by stored XSS. This affects RBR20 before 2.3.5.26, RBS20 before 2.3.5.26, RBK20 before 2.3.5.26, RBR40 before 2.3.5.30, RBS40 before 2.3.5.30, RBK40 before 2.3.5.30, RBR50 before 2.3.5.30, RBS50 before 2.3.5.30, and RBK50 before 2.3.5.30.

MediumCVSS 6Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2019-20667 is a stored cross-site scripting issue in specific NETGEAR RBR, RBS, and RBK WiFi system models. A vulnerable device could store attacker-supplied script content that later runs in a management context. The available sources rate it medium severity, not a confirmed internet-wide emergency.

Executive priority

Treat this as a scheduled remediation item, not a crisis response, unless affected devices manage sensitive networks or cannot be updated. Prioritize firmware verification and administrative access control.

Technical view

The CVE describes stored XSS affecting RBR20, RBS20, RBK20 before 2.3.5.26 and RBR40, RBS40, RBK40, RBR50, RBS50, RBK50 before 2.3.5.30. CVSS 3.0 is 6.0 with local attack vector, low complexity, high privileges required, no user interaction, and high confidentiality and integrity impact.

Likely exposure

Exposure is limited to environments running the listed NETGEAR models below the fixed firmware thresholds. The CVSS vector indicates local access and high privileges are required. The source bundle does not support assuming broad remote exposure.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Stored XSS can matter because malicious content persists and may affect later administrative use, but the CVSS privileges requirement reduces likely opportunistic abuse.

Researcher notes

The affected list in the CVE bundle is specific, but the structured CPE affected section is not populated. Rely on model and firmware thresholds from the description and NETGEAR advisory rather than generalized product assumptions.

Mitigation direction

  • Upgrade affected RBR20, RBS20, and RBK20 devices to 2.3.5.26 or later.
  • Upgrade affected RBR40, RBS40, RBK40, RBR50, RBS50, and RBK50 to 2.3.5.30 or later.
  • Check NETGEAR advisory guidance for model-specific firmware availability.
  • Restrict administrative access to trusted users and trusted networks.
  • Retire devices that cannot receive supported firmware.

Validation and detection

  • Inventory NETGEAR RBR, RBS, and RBK model numbers in use.
  • Compare firmware versions against the CVE affected version thresholds.
  • Confirm administrative interfaces are not exposed beyond trusted management paths.
  • Review change records for successful firmware updates.
  • Monitor vendor advisories for superseding guidance.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CVE-2019-20667 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
6 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AC:L/AV:L/A:N/C:H/I:H/PR:H/S:U/UI:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6CVSS 3.0MediumCVSS:3.0/AC:L/AV:L/A:N/C:H/I:H/PR:H/S:U/UI:N0.85.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

6Medium
CVSS 3.0 vector shape for CVE-2019-20667Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AC:L/AV:L/A:N/C:H/I:H/PR:H/S:U/UI:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.