Security readout for executives and security teams
Plain-English summary
This vulnerability affects NETGEAR R7800 routers running firmware before 1.0.2.60. An authenticated user could inject operating-system commands, potentially compromising router confidentiality, integrity, and availability. The source bundle does not show active exploitation.
Executive priority
Treat as a targeted network-device remediation item. Prioritize if R7800 routers exist in business networks, because a compromised router can affect traffic handling, monitoring, and network trust boundaries.
Technical view
CVE-2018-21106 is a post-authentication command injection issue in NETGEAR R7800 firmware before 1.0.2.60. CVSS 3.0 is 6.8 with adjacent-network attack vector, high privileges required, no user interaction, and high C/I/A impact.
Likely exposure
Exposure is limited to NETGEAR R7800 devices on firmware earlier than 1.0.2.60, especially where router administration is reachable from local or adjacent networks by privileged users.
Exploitation context
The bundle marks KEV as false and provides no cited evidence of active exploitation. Risk depends on attacker access to authenticated router administration and proximity implied by the CVSS adjacent-network vector.
Researcher notes
Public detail in the bundle is sparse: no CWE, affected CPEs, exploit path, or proof-of-concept is provided. The defensible conclusion is post-auth command injection on R7800 before 1.0.2.60 with high impact but constrained access requirements.
Mitigation direction
- Inventory NETGEAR R7800 devices and record firmware versions.
- Follow NETGEAR advisory guidance for PSV-2018-0360.
- Upgrade affected R7800 firmware to 1.0.2.60 or later.
- Restrict router administration to trusted management networks.
- Review and rotate privileged router credentials where exposure is plausible.
Validation and detection
- Confirm whether any R7800 device runs firmware before 1.0.2.60.
- Verify administrative interfaces are not broadly reachable.
- Review privileged router accounts for unknown or shared access.
- Check router logs for unexpected administrative changes.
- Document remediation status in asset and vulnerability tracking systems.
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-2018-21106 mapping review
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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/000060445/Security-Advisory-for-a-Post-Authentication-Command-Injection-on-R7800-PSV-2018-0360CVE 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.