Security readout for executives and security teams
Plain-English summary
This CVE affects certain NETGEAR managed switches and could let a lower-privileged local user gain higher privileges. For organizations using the listed M4300 or M4200 models, the main business risk is loss of control over critical switching infrastructure before firmware 12.0.2.15.
Executive priority
Treat this as a high-priority infrastructure hygiene issue where affected switches exist. It is not evidenced as actively exploited in the supplied sources, but compromised switch privileges can affect network reliability and trust.
Technical view
CVE-2017-18826 is a vertical privilege escalation issue in specified NETGEAR M4300 variants and M4200 switches before firmware 12.0.2.15. The CVSS 3.0 vector is local, low complexity, low privileges required, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to organizations running the named NETGEAR M4300 or M4200 managed switches on firmware earlier than 12.0.2.15. The CVE record does not identify broader product families or cloud services as affected.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The CVSS vector indicates exploitation requires local access and existing low privileges, but successful escalation could compromise switch administration and network availability.
Researcher notes
Public details are sparse: no CWE is listed and the bundle does not include exploit mechanics. Focus validation on model and firmware matching, privilege boundaries, and vendor advisory review. Do not assume products beyond the named NETGEAR switches are affected.
Mitigation direction
- Upgrade affected NETGEAR switches to firmware 12.0.2.15 or later.
- Confirm the exact model is listed in the NETGEAR advisory before prioritizing.
- Restrict management access to trusted administrators until upgrades are complete.
- Review NETGEAR guidance for any model-specific remediation details.
Validation and detection
- Inventory NETGEAR M4300 and M4200 switches across the environment.
- Compare installed firmware versions against 12.0.2.15.
- Check switch administration logs for unexpected privilege changes.
- Verify management interfaces are not broadly reachable by low-privileged users.
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.
Privilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-18826 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
- 7.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:L/A:H/C:H/I:H/PR:L/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:L/S:U/UI:N1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/AC:L/AV:L/A:H/C:H/I:H/PR:L/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000049039/Security-Advisory-for-Vertical-Privilege-Escalation-on-Some-Fully-Managed-Switches-PSV-2017-1940CVE 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.