Security readout for executives and security teams
Plain-English summary
This flaw affects specific older NETGEAR router firmware. An unauthenticated attacker could trigger a stack-based buffer overflow before login, with potential compromise of confidentiality, integrity, and availability. The provided sources do not show CISA KEV listing or active exploitation evidence.
Executive priority
Treat this as a high-priority legacy router remediation item. It is not proven actively exploited in the provided sources, but unauthenticated pre-login router flaws can create meaningful business risk if vulnerable hardware remains deployed.
Technical view
CVE-2017-18727 is a pre-authentication stack-based buffer overflow affecting NETGEAR D6200 before 1.1.00.24 and R6700v2, R6800, R6900v2 before 1.1.0.42. CVSS 3.0 is 8.8 with adjacent attack vector, low complexity, no privileges, no user interaction, and high C/I/A impact.
Likely exposure
Exposure is limited to environments still running the listed NETGEAR models below the fixed firmware versions. The CVSS vector indicates adjacent-network reachability, so risk is highest on local or nearby network segments containing vulnerable routers.
Exploitation context
The provided bundle contains no KEV listing and no cited evidence of active exploitation. The issue is still serious because it is unauthenticated, pre-authentication, and rated high impact by CVSS.
Researcher notes
The source bundle is sparse: no CWE entry, no exploit details, and no operational indicators are provided. Analysis should stay anchored to affected model and version checks, CVSS 3.0 vector AV:A/AC:L/PR:N/UI:N, and the NETGEAR advisory.
Mitigation direction
- Inventory NETGEAR D6200, R6700v2, R6800, and R6900v2 devices.
- Upgrade D6200 devices to 1.1.00.24 or later.
- Upgrade R6700v2, R6800, and R6900v2 devices to 1.1.0.42 or later.
- Review the NETGEAR advisory for model-specific firmware guidance.
- Remove or replace devices that cannot be brought to a fixed version.
Validation and detection
- Confirm each router model and firmware version from administrative inventory.
- Verify D6200 firmware is not below 1.1.00.24.
- Verify R6700v2, R6800, and R6900v2 firmware is not below 1.1.0.42.
- Document whether any listed router remains in service below the fixed 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-2017-18727 mapping review
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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/000051528/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Routers-PSV-2017-2138CVE 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.