Security readout for executives and security teams
Plain-English summary
This flaw affects several NETGEAR router models and can be triggered by an unauthenticated attacker on an adjacent network. A successful attack could compromise confidentiality, integrity, and availability. The cited data does not show active exploitation or CISA KEV listing.
Executive priority
Prioritize remediation where these routers protect business networks, remote sites, or executive homes. The issue is high severity because authentication is not required and successful compromise could fully affect router security properties.
Technical view
CVE-2017-18721 is a pre-authentication stack-based buffer overflow affecting NETGEAR D6200, R6700v2, R6800, and R6900v2 firmware before specified fixed versions. CVSS 3.0 is 8.8 with adjacent-network attack vector, low complexity, no privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is most likely where affected NETGEAR routers remain on vulnerable firmware and are reachable by an attacker on the same or adjacent network segment. Internet-wide exposure is not established by the supplied CVSS vector or sources.
Exploitation context
The sources support unauthenticated adjacent-network attack potential, but do not cite public exploitation, weaponized tooling, or active exploitation. CISA KEV status is false in the provided bundle.
Researcher notes
The affected product list in the CVE record is more specific than the generic affected CPE fields in the supplied bundle. Analysis relies on the CVE description, CVSS vector, and NETGEAR advisory reference; exploit details and broader product impact are not established here.
Mitigation direction
- Update D6200 firmware to version 1.1.00.24 or later.
- Update R6700v2, R6800, and R6900v2 to version 1.1.0.42 or later.
- Check NETGEAR advisory PSV-2017-2147 for model-specific update guidance.
- Retire or isolate devices that cannot be updated per vendor guidance.
Validation and detection
- Inventory NETGEAR D6200, R6700v2, R6800, and R6900v2 devices.
- Record current firmware versions for each identified router.
- Confirm vulnerable models are at or above the fixed firmware versions.
- Verify remediation evidence against the NETGEAR advisory and asset records.
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-2017-18721 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
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N
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:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000052276/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Routers-PSV-2017-2147CVE reference · x_refsource_CONFIRM
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.