Security readout for executives and security teams
Plain-English summary
A logged-in administrator on a nearby network could abuse a command injection flaw on NETGEAR R7800 routers running firmware before 1.0.2.60. Successful abuse could allow serious confidentiality, integrity, and availability impact, but the attacker needs high privileges first.
Executive priority
Treat as a targeted infrastructure hygiene issue, not an emergency from the provided evidence. Prioritize remediation for internet-edge or shared-network locations because router compromise can affect traffic, availability, and downstream security controls.
Technical view
CVE-2018-21107 is a post-authentication command injection issue in NETGEAR R7800 firmware before 1.0.2.60. The CVSS 3.0 score is 6.8: adjacent network attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high C/I/A impact.
Likely exposure
Exposure is limited to NETGEAR R7800 devices on firmware older than 1.0.2.60, especially where router administration is reachable from less-trusted local or adjacent networks.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The issue requires authenticated high-privilege access, so stolen, shared, or weak administrator credentials would materially increase risk.
Researcher notes
The source bundle identifies only NETGEAR R7800 before 1.0.2.60. No CWE, exploit details, broad product matrix, or KEV evidence is provided. Avoid generalizing to other NETGEAR models without vendor confirmation.
Mitigation direction
- Upgrade NETGEAR R7800 firmware to 1.0.2.60 or later per vendor guidance.
- Restrict router administration to trusted management networks only.
- Disable remote or unnecessary management exposure where applicable.
- Review and rotate administrator credentials for affected routers.
- Check NETGEAR advisory for any newer firmware or guidance.
Validation and detection
- Inventory deployed NETGEAR R7800 routers and record firmware versions.
- Confirm affected devices are not running firmware before 1.0.2.60.
- Verify management interfaces are reachable only from trusted networks.
- Review administrative accounts for unnecessary or shared privileges.
- Check available administrative logs for unexpected privileged access.
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-2018-21107 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/000060444/Security-Advisory-for-a-Post-Authentication-Command-Injection-on-R7800-PSV-2018-0359CVE 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.