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PatchSiren cyber security CVE debrief

CVE-2018-14558 Tenda CVE debrief

CVE-2018-14558 is a command injection vulnerability affecting Tenda AC7, AC9, and AC10 routers. CISA lists the issue in its Known Exploited Vulnerabilities catalog, which means it has been identified as actively exploited or otherwise confirmed as a real-world attack risk. The supplied guidance is straightforward: apply updates per vendor instructions and treat affected devices as a security priority.

Vendor
Tenda
Product
AC7, AC9, and AC10 Routers
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations and individuals that manage Tenda AC7, AC9, or AC10 routers should pay attention, especially if the devices are internet-facing or used in small-office/home-office environments. Network administrators, IT teams, and incident responders should prioritize these devices because CISA has placed the CVE in the KEV catalog.

Technical summary

The vulnerability is described as a command injection flaw in Tenda AC7, AC9, and AC10 routers. Based on the supplied source corpus, the key technical fact is the affected product family and vulnerability class; the record does not provide deeper implementation details in the provided materials. CISA’s KEV entry links the CVE to known exploitation and directs defenders to apply vendor updates.

Defensive priority

High. CISA KEV inclusion indicates this issue should be treated as an urgent remediation item even though no CVSS score was supplied in the source corpus.

Recommended defensive actions

  • Identify whether any Tenda AC7, AC9, or AC10 routers are present in your environment.
  • Apply vendor-provided updates or remediation steps as instructed by Tenda and referenced by CISA.
  • Prioritize internet-facing or remotely managed devices for immediate review.
  • Restrict and monitor access to router administration interfaces.
  • Inspect affected devices for unexpected configuration changes or abnormal behavior after remediation.
  • Use the CVE.org and NVD records to confirm the CVE and track any additional official updates.

Evidence notes

The supplied CISA KEV source identifies CVE-2018-14558 as "Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability," marks it as known exploited, and gives the required action as "Apply updates per vendor instructions." The supplied official reference links include the CVE.org record and the NVD detail page, which corroborate the CVE identity and product scope. No CVSS score was provided in the corpus.

Official resources

CISA’s KEV source in the supplied corpus is dated 2021-11-03, and the provided CVE record timestamps are also 2021-11-03. Those dates reflect the supplied record timeline and should not be treated as the original discovery date of the issue