Security readout for executives and security teams
Plain-English summary
Some older NETGEAR routers and extenders can allow an unauthenticated nearby network attacker to run operating-system commands on the device. A successful attack could compromise confidentiality, integrity, and availability of the router, affecting traffic and network trust.
Executive priority
Treat this as a high-priority legacy network-device risk. Prioritize remediation for devices supporting business networks, remote offices, or privileged connectivity, especially if firmware status is unknown.
Technical view
CVE-2017-18734 is a pre-authentication command injection issue affecting specific NETGEAR firmware versions. The CVSS 3.0 vector is AV:A/AC:L/PR:N/UI:N with high confidentiality, integrity, and availability impact, producing an 8.8 high score.
Likely exposure
Exposure is most likely where the listed NETGEAR models remain deployed below the fixed firmware versions. The CVSS vector indicates adjacent-network attack scope, not confirmed broad internet reach from the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. Risk remains significant because the flaw is unauthenticated, low-complexity, and can lead to command execution on network edge equipment.
Researcher notes
The provided affected list is explicit, but the source bundle does not include exploit details, proof-of-concept status, or broader product families. Keep analysis scoped to the named NETGEAR models and versions.
Mitigation direction
- Inventory the listed NETGEAR models and record their current firmware versions.
- Use NETGEAR advisory PSV-2017-2154 to match each model to its fixed firmware version.
- Update affected devices to the fixed firmware version or later.
- Replace or retire devices that cannot run non-vulnerable firmware.
- Restrict access to affected devices until remediation is complete.
Validation and detection
- Confirm whether any listed model exists in network, branch, lab, or home-office inventories.
- Compare firmware against the affected-before versions in the CVE description.
- Review device management records for successful firmware updates.
- Check logs for unusual administrative changes or unexplained device instability.
- Document unsupported devices and compensating controls.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-18734 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/000051521/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-and-Extenders-PSV-2017-2154CVE 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.