Security readout for executives and security teams
Plain-English summary
CVE-2017-18720 is an authentication bypass in specific NETGEAR router models. Affected routers running older firmware could let an attacker bypass login protections. The CVSS vector indicates adjacent-network access, so business risk is highest where untrusted users or devices share local network or Wi-Fi access.
Executive priority
Prioritize remediation where these routers protect business, branch, or remote-office networks. The issue has high potential impact, but the provided evidence does not establish active exploitation.
Technical view
The CVE covers NETGEAR D6200 before 1.1.00.24 and R6700v2, R6800, and R6900v2 before 1.1.0.42. It is rated CVSS 8.8 with low complexity, no privileges, no user interaction, adjacent attack vector, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to the listed NETGEAR models on vulnerable firmware. The CVSS vector specifies adjacent network access, so internet-wide exposure is not established by the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. Treat this as high impact if affected routers remain in use, but do not claim confirmed exploitation from these sources.
Researcher notes
Key uncertainty is product metadata: the CVE record lists affected model versions in prose while the structured affected fields are n/a. Validation should rely on model and firmware matching from NETGEAR and CVE references.
Mitigation direction
- Identify whether affected NETGEAR models are deployed or still supported.
- Upgrade D6200 firmware to 1.1.00.24 or later.
- Upgrade R6700v2, R6800, and R6900v2 firmware to 1.1.0.42 or later.
- Review NETGEAR advisory for current vendor guidance.
- Limit untrusted access to local networks containing router management interfaces.
Validation and detection
- Inventory router model names and exact firmware versions.
- Compare firmware versions against the affected ranges in the CVE.
- Confirm router management is not reachable from untrusted local segments.
- After updating, recheck firmware version from the device interface.
- Document any unsupported or unreachable devices for replacement planning.
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.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-18720 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/000052277/Security-Advisory-for-Authentication-Bypass-on-Routers-PSV-2017-2148CVE 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.