Security readout for executives and security teams
Plain-English summary
CVE-2017-18739 is a high-severity pre-authentication buffer overflow in specific NETGEAR router models. An unauthenticated attacker on an adjacent network could potentially compromise confidentiality, integrity, and availability on affected devices running older firmware.
Executive priority
Treat this as a high-priority infrastructure hygiene issue. It affects routers, requires no authentication, and has high impact, but the provided sources do not prove current exploitation.
Technical view
The CVE describes an unauthenticated buffer overflow affecting NETGEAR R6220, R7800, WNDR3400v3, and WNDR3700v5 below listed firmware 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 limited to the named NETGEAR router models running firmware older than the fixed versions: R6220 V1.1.0.50, R7800 V1.0.2.36, WNDR3400v3 1.0.1.14, or WNDR3700v5 V1.1.0.48.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The risk remains material because the flaw is unauthenticated, low-complexity, and affects network edge equipment.
Researcher notes
The CVE metadata contains generic affected CPE fields, so rely on the description and NETGEAR advisory for affected models and fixed versions. No CWE is provided in the source bundle.
Mitigation direction
- Inventory environments for the four NETGEAR models named in the CVE.
- Upgrade affected devices to the fixed firmware versions or later.
- Check the NETGEAR advisory for model-specific firmware guidance.
- Replace devices that cannot run fixed firmware.
- Prioritize remediation for routers in branch, guest, or shared network locations.
Validation and detection
- Confirm each deployed router model and exact firmware version.
- Compare firmware against the fixed versions listed in the CVE.
- Verify update completion after firmware maintenance windows.
- Record devices that are unsupported or cannot be upgraded.
- Monitor vendor guidance for any newer advisory updates.
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-2017-18739 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/000051516/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2017-0670CVE 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.