Security readout for executives and security teams
Plain-English summary
Certain Tenda AC7, AC9, and AC10 router firmware versions contain a remote command injection flaw. An unauthenticated network attacker could make the device run operating system commands, potentially taking full control of the router. CISA lists this CVE as known exploited, so exposed devices should be treated as urgent risk.
Executive priority
Prioritize identification and removal of exposed affected routers. This is a critical, unauthenticated remote code execution issue on edge devices, and KEV listing means defenders should assume real-world attacker interest, not theoretical risk.
Technical view
CVE-2018-14558 is CWE-78 command injection in Tenda router firmware. The vulnerable formsetUsbUnload logic passes untrusted input into dosystemCmd, enabling arbitrary OS command execution. CVSS 3.1 is 9.8: network reachable, low complexity, no privileges, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where affected Tenda AC7 through V15.03.06.44_CN, AC9 through V15.03.05.19(6318)_CN, or AC10 through V15.03.06.23_CN devices remain deployed, especially with management interfaces reachable from untrusted networks.
Exploitation context
CISA KEV status supports known exploitation in the wild. The source bundle does not provide campaign details, exploitation volume, or a confirmed vendor patch path. Public technical references describe the vulnerable code path, increasing practical risk for unremediated devices.
Researcher notes
The CVE record names affected Tenda models and firmware thresholds, but structured affected-product metadata is incomplete. Sources support command injection through formsetUsbUnload and dosystemCmd. No patch version, vendor advisory, or safe detection method is included in the provided bundle.
Mitigation direction
- Inventory Tenda AC7, AC9, and AC10 routers and record firmware versions.
- Remove internet or untrusted-network access to router management interfaces.
- Check Tenda or device-provider guidance for fixed firmware or replacement advice.
- Replace devices if no supported firmware or vendor remediation is available.
- Monitor affected networks for unusual router behavior or configuration changes.
Validation and detection
- Confirm whether any deployed routers match the affected models and firmware versions.
- Verify management interfaces are not reachable from the internet or guest networks.
- Review router and network logs for unexpected administrative activity or command-execution indicators.
- Document remediation status for each affected device.
- Track CISA KEV and CVE records for updated vendor or exploitation details.
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.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution 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-2018-14558 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
CISA KEV status
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.mdCVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14558CVE reference · government-resource
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.