Security readout for executives and security teams
Plain-English summary
CVE-2018-21104 is a post-authentication command injection issue in NETGEAR R7800 routers before firmware 1.0.2.60. An attacker would need authenticated access, but successful exploitation could compromise confidentiality, integrity, and availability of the device.
Executive priority
Treat as a moderate-priority infrastructure hygiene issue. The privilege requirement reduces urgency versus unauthenticated router flaws, but command injection on network equipment can create serious business impact if admin access is compromised.
Technical view
The CVE describes authenticated command injection affecting NETGEAR R7800 devices before 1.0.2.60. The CVSS 3.0 vector is AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, indicating adjacent-network reach, high privileges required, no user interaction, and high impact.
Likely exposure
Exposure is most likely where NETGEAR R7800 routers are still running firmware earlier than 1.0.2.60 and have administrative access reachable by untrusted or broadly shared networks.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation evidence. Exploitation requires authenticated access with high privileges, which lowers likelihood but leaves serious device impact if credentials or admin sessions are misused.
Researcher notes
The source bundle identifies the affected device and version threshold but lists no CWE, CPE, exploit details, or active exploitation evidence. Analysis should stay focused on firmware verification, administrative exposure, and vendor advisory tracking.
Mitigation direction
- Upgrade NETGEAR R7800 firmware to 1.0.2.60 or later.
- Review the NETGEAR advisory for current vendor guidance.
- Restrict router administration to trusted users and management networks.
- Remove stale or shared administrative accounts where possible.
- Monitor vendor updates for any later replacement guidance.
Validation and detection
- Inventory NETGEAR R7800 devices in the environment.
- Check each device firmware version against 1.0.2.60.
- Confirm administrative interfaces are not broadly reachable.
- Review admin account ownership and necessity.
- Document remediation status for vulnerable devices.
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-2018-21104 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/000060447/Security-Advisory-for-a-Post-Authentication-Command-Injection-on-R7800-PSV-2018-0362CVE 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.