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CVE Record

CVE-2017-18759: Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user.

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects R8300 before 1.0.2.104 and R8500 before 1.0.2.104.

MediumCVSS 6.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2017-18759 affects NETGEAR R8300 and R8500 routers running firmware before 1.0.2.104. An already authenticated user could trigger a stack-based buffer overflow with severe confidentiality, integrity, and availability impact. Business urgency is moderate because administrator-level access and adjacent-network reachability are required, but exposed legacy routers should still be upgraded promptly.

Executive priority

Treat as a planned-priority router firmware remediation unless affected devices manage sensitive or critical networks. Escalate urgency if vulnerable R8300 or R8500 devices are still deployed, remotely managed, or reachable by untrusted adjacent users.

Technical view

The CVE describes a post-authentication stack-based buffer overflow on NETGEAR R8300 and R8500 before firmware 1.0.2.104. CVSS 3.0 is 6.8 with AV:A, AC:L, PR:H, UI:N, S:U, and high C/I/A impact. The source bundle does not identify a CWE, vulnerable component, exploit method, or affected CPE entries.

Likely exposure

Exposure is limited to NETGEAR R8300 and R8500 devices below firmware 1.0.2.104. The CVSS vector indicates adjacent-network access and high privileges are required, so internet-wide unauthenticated exposure is not supported by the provided sources.

Exploitation context

The bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires an authenticated high-privilege user and adjacent network access, but successful exploitation could compromise confidentiality, integrity, and availability of the device.

Researcher notes

Evidence is sparse: the CVE and NETGEAR advisory identify affected models and fixed version, but not the vulnerable endpoint, CWE mapping, exploit maturity, or detailed workaround. Avoid assuming broader NETGEAR impact beyond R8300 and R8500 before 1.0.2.104.

Mitigation direction

  • Upgrade R8300 and R8500 firmware to 1.0.2.104 or later.
  • Review the NETGEAR advisory for model-specific firmware guidance.
  • Restrict router administration to trusted management networks.
  • Remove unnecessary administrator accounts and enforce strong admin credentials.
  • Replace unsupported or unpatchable affected devices.

Validation and detection

  • Inventory NETGEAR R8300 and R8500 devices in use.
  • Confirm each device firmware version is 1.0.2.104 or later.
  • Verify administrative access is restricted to trusted networks.
  • Check vulnerability management records for this CVE on router assets.
  • Retain evidence of firmware version after remediation.
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-2017-18759 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AC:L/AV:A/A:H/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
6.8CVSS 3.0MediumCVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N0.95.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

6.8Medium
CVSS 3.0 vector shape for CVE-2017-18759Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AC:L/AV:A/A:H/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

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