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PatchSiren cyber security CVE debrief

CVE-2026-11556 Tenda CVE debrief

CVE-2026-11556 is a HIGH severity vulnerability with a CVSS score of 7.4. The vulnerability affects Tenda F451 versions 1.0.0.7 and 1.0.0.9, specifically in the formWriteFacMac function of the /goform/WriteFacMac file, allowing for os command injection via manipulation of the mac argument. This vulnerability can be exploited remotely.

Vendor
Tenda
Product
F451
CVSS
HIGH 7.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Administrators and users of Tenda F451 versions 1.0.0.7 and 1.0.0.9 should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by improper sanitization of user input in the formWriteFacMac function of the /goform/WriteFacMac file. An attacker can inject os commands by manipulating the mac argument, allowing for remote exploitation.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Restrict access to the affected system and limit the attack surface.
  • Monitor the system for suspicious activity and implement additional security measures if necessary.

Evidence notes

The vulnerability has been publicly disclosed and an exploit has been released.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11556 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11556

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11556 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11556

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.