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CVE Record

CVE-2019-20759: NETGEAR R9000 devices before 1.0.4.26 are affected by stored XSS.

NETGEAR R9000 devices before 1.0.4.26 are affected by stored XSS.

HighCVSS 7.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects NETGEAR R9000 devices running firmware before 1.0.4.26. It is a stored cross-site scripting flaw, meaning malicious script can persist in device-managed content and later run in a user’s browser. The main business concern is exposure of sensitive router administration data if an administrator or user views the affected content.

Executive priority

Address this as a high-priority firmware hygiene item for any confirmed R9000 estate. It is not presented as internet-wide active exploitation in the bundle, but router administration compromise can carry significant confidentiality impact.

Technical view

CVE-2019-20759 is stored XSS in NETGEAR R9000 firmware before 1.0.4.26. CVSS 3.0 is 7.4 high with AV:A, AC:L, PR:N, UI:R, S:C, C:H, I:L, A:N. The bundle does not provide endpoint details, CWE mapping, affected CPEs, or proof-of-exploit information.

Likely exposure

Exposure is most likely where NETGEAR R9000 devices remain on firmware earlier than 1.0.4.26 and their management surface is reachable from adjacent or local networks. The provided affected-product metadata is incomplete, so validation should focus on confirmed R9000 inventory and firmware versions.

Exploitation context

The source bundle does not indicate active exploitation, and the CVE is not marked KEV. CVSS indicates adjacent-network access, no privileges, and required user interaction. Treat exploitability as plausible but not confirmed in the provided evidence.

Researcher notes

The public bundle is sparse: it names stored XSS and the fixed firmware threshold but omits affected parameters, CWE, CPEs, exploit details, and remediation specifics beyond versioning. Avoid assuming other NETGEAR models are affected without vendor evidence.

Mitigation direction

  • Upgrade NETGEAR R9000 firmware to 1.0.4.26 or later.
  • Review NETGEAR’s advisory for any current vendor instructions.
  • Restrict router administration access to trusted management networks.
  • Remove or disable unnecessary management exposure where operationally possible.
  • Prioritize unmanaged or remote-site R9000 devices for firmware verification.

Validation and detection

  • Inventory NETGEAR R9000 devices across offices and remote sites.
  • Confirm each R9000 firmware version is 1.0.4.26 or later.
  • Check whether management interfaces are reachable from untrusted local segments.
  • Review device administration logs for unexpected configuration changes.
  • Track exceptions where firmware cannot be upgraded promptly.
Prepared
Confidence
medium
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

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CVE-2019-20759 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.4 (3.0)
Known Exploited
No
Published

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

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
7.4CVSS 3.0HighCVSS:3.0/AC:L/AV:A/A:N/C:H/I:L/PR:N/S:C/UI:R2.14.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.4High
CVSS 3.0 vector shape for CVE-2019-20759Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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

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