Security readout for executives and security teams
Plain-English summary
This CVE covers an authentication bypass in specific NETGEAR routers and extenders. Affected devices are older firmware builds on listed models. The business risk is unauthorized access to network device functions, with high confidentiality, integrity, and availability impact in the CVSS record.
Executive priority
Treat as high priority for any environment still using the listed NETGEAR models. The issue is old, but network appliances are often missed in patch programs, and the impact rating is high across confidentiality, integrity, and availability.
Technical view
CVE-2017-18772 is an authentication bypass affecting named NETGEAR routers and extenders below specified firmware versions. The CVSS 3.0 score is 8.8 with adjacent-network attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high C/I/A impact.
Likely exposure
Exposure is most likely where listed NETGEAR models run firmware below the fixed versions and are reachable from an adjacent network. The source bundle does not establish broader internet exposure or affected products beyond the models named in the CVE description.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Risk remains material because the CVSS vector indicates unauthenticated, low-complexity exploitation from an adjacent network with high impact.
Researcher notes
The structured affected field in the bundle is not populated, but the CVE description lists models and fixed firmware thresholds. Do not infer additional NETGEAR products. No exploit mechanics, public exploit status, or compensating vendor controls are provided in the bundle.
Mitigation direction
- Identify listed NETGEAR router and extender models in your environment.
- Upgrade affected devices to the fixed firmware versions or later.
- Follow the linked NETGEAR security advisory for vendor-specific guidance.
- Restrict administrative access to trusted networks while remediation is pending.
- Replace devices that cannot be updated or verified.
Validation and detection
- Inventory device model numbers and firmware versions.
- Compare firmware against each fixed version in the CVE description.
- Confirm remediation guidance against the NETGEAR advisory.
- Verify administrative interfaces are not broadly reachable.
- Document any affected devices that remain temporarily isolated.
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-2017-18772 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/000051471/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-and-Extenders-PSV-2017-0424CVE 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.