Security readout for executives and security teams
Plain-English summary
This is a post-authentication buffer overflow in specific NETGEAR routers and gateways. An attacker would need authenticated access, but successful exploitation could seriously affect confidentiality, integrity, and availability. The business risk is concentrated in environments still running the listed older firmware.
Executive priority
Treat as a targeted remediation item, not an emergency, unless affected devices are exposed or poorly controlled. Prioritize firmware updates during the next router maintenance cycle.
Technical view
CVE-2018-21184 is a stack-based buffer overflow affecting NETGEAR D6100, D7800, R7500v2, R7800, and R9000 firmware before specified fixed releases. The CVSS 3.0 score is 6.8 with adjacent-network access, high privileges, no user interaction, and high impact to confidentiality, integrity, and availability.
Likely exposure
Exposure is likely limited to organizations using the named NETGEAR models with outdated firmware and reachable administrative access. The sources do not identify other products or cloud services as affected.
Exploitation context
The provided sources describe a post-authentication issue and do not show CISA KEV listing or active exploitation evidence. Risk rises if administrative credentials are shared, weak, reused, or exposed to untrusted networks.
Researcher notes
Evidence is limited to the CVE record and NETGEAR advisory reference. The CVSS vector indicates high privileges and adjacent-network access, so validation should focus on model, firmware level, and administrative exposure rather than broad internet scanning.
Mitigation direction
- Upgrade affected NETGEAR firmware to the vendor-listed fixed version or later.
- Check NETGEAR’s advisory for model-specific firmware guidance.
- Restrict administrative access to trusted administrators and trusted networks.
- Review administrative account hygiene for affected devices.
Validation and detection
- Inventory NETGEAR D6100, D7800, R7500v2, R7800, and R9000 devices.
- Compare installed firmware against the fixed versions listed in the CVE description.
- Confirm administrative interfaces are not reachable from untrusted networks.
- Check device logs for unexpected administrative access where available.
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.
CVE-2018-21184 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
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/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:H/S:U/UI:N0.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000055174/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2017-2615CVE 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.