Security readout for executives and security teams
Plain-English summary
CVE-2017-18849 is a high-severity command injection issue in several NETGEAR routers and modem routers. An attacker with local access conditions described by CVSS could potentially run unintended commands on affected devices, risking device takeover, data exposure, or service disruption. The provided sources identify fixed firmware thresholds for many models.
Executive priority
Treat this as a high-priority network edge hygiene issue. Prioritize identifying affected NETGEAR hardware and closing firmware gaps, especially in offices, remote sites, and unmanaged environments where consumer-grade routers may persist without centralized patching.
Technical view
The CVE describes command injection affecting listed NETGEAR D-series and R-series devices before specified firmware versions. CVSS 3.0 score is 8.4 with low complexity, no privileges, no user interaction, local attack vector, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where affected NETGEAR models remain on firmware below the fixed versions listed in the advisory. The bundle does not identify internet-scale exposure, default vulnerable configurations, or unsupported model status.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates local attack vector with no privileges or user interaction, so urgency depends on who can reach or locally interact with device management paths.
Researcher notes
The bundle provides affected model/version thresholds and CVSS, but not vulnerable parameter details, exploit prerequisites beyond CVSS, or proof-of-concept status. Avoid assuming remote exploitability or active exploitation without additional vendor or threat-intelligence evidence.
Mitigation direction
- Inventory NETGEAR models listed in the advisory.
- Compare installed firmware with the fixed version thresholds.
- Upgrade affected devices to the listed fixed firmware or later.
- Check NETGEAR guidance for each model before rollout.
- Replace devices if no supported firmware path exists.
- Limit administrative access until firmware is verified.
Validation and detection
- Confirm exact router or modem-router model numbers.
- Record current firmware versions from device management records.
- Match each device against the affected version list.
- Verify upgraded devices report fixed firmware or later.
- Review logs for unexpected configuration or administration changes.
- Document exceptions 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-2017-18849 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
- 8.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:L/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:L/A:H/C:H/I:H/PR:N/S:U/UI:N2.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.4HighVector: CVSS:3.0/AC:L/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000048999/Security-Advisory-for-Command-Injection-on-Some-Routers-and-Modem-Routers-PSV-2017-1209CVE 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.