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PatchSiren cyber security CVE debrief

CVE-2026-11553 Tenda CVE debrief

CVE-2026-11553 is a HIGH severity vulnerability (CVSS Score: 7.4) affecting Tenda HG7HG9 and HG10 300001138_en_xpon devices. The vulnerability is caused by a stack-based buffer overflow in the `formPPPEdit` function of the `/boaform/formPPPEdit` file, which can be exploited remotely by manipulating the `encodename` argument. The exploit has been made public and could be used.

Vendor
Tenda
Product
HG7HG9 and HG10
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 HG7HG9 and HG10 300001138_en_xpon devices should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by a stack-based buffer overflow in the `formPPPEdit` function of the `/boaform/formPPPEdit` file. The attack can be launched remotely by manipulating the `encodename` argument.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by the vendor, if available.
  • Limit access to the affected devices and networks.
  • Monitor network traffic and system logs for suspicious activity.

Evidence notes

The CVE record was published on 2026-06-08T18:16:32.480Z and modified on 2026-06-09T01:32:36.950Z. The vulnerability has been reported by Vuldb and has a CVSS score of 7.4.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11553 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11553

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

  • CVE-2026-11553 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11553

    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.