CVE-2026-6988
Published: 25 April 2026
Summary
CVE-2026-6988 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda Hg10 Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 23.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates CVE-2026-6988 by requiring timely application of vendor firmware updates that remediate the buffer overflow in the formRoute function.
Prevents exploitation of the buffer overflow by enforcing validation of the nextHop argument in the /boaform/formRouting endpoint to reject malformed inputs.
Mitigates successful exploitation of the buffer overflow vulnerability through memory protection mechanisms such as stack canaries and address space randomization.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in public-facing Boa web server form (formRouting) enables remote authenticated exploitation for arbitrary code execution and full system compromise on the router.
NVD Description
A flaw has been found in Tenda HG10 HG7_HG9_HG10re_300001138_en_xpon. This issue affects the function formRoute of the file /boaform/formRouting of the component Boa Service. This manipulation of the argument nextHop causes buffer overflow. It is possible to initiate the attack…
more
remotely. The exploit has been published and may be used.
Deeper analysisAI
CVE-2026-6988 is a buffer overflow vulnerability (CWE-119, CWE-120) affecting Tenda HG10 routers running firmware HG7_HG9_HG10re_300001138_en_xpon. The issue lies in the formRoute function of the /boaform/formRouting file within the Boa Service component, where manipulation of the nextHop argument triggers the overflow. Published on 2026-04-25 with a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), it enables remote exploitation.
Attackers with low privileges, such as authenticated users, can exploit this remotely with low complexity and no user interaction required. Successful exploitation grants high-impact access to confidentiality, integrity, and availability, potentially leading to arbitrary code execution or full system compromise on the affected router.
A proof-of-concept exploit is publicly available on GitHub at https://github.com/xyh4ck/iot_poc/blob/main/Tenda/HG10/01_Buffer_Overflow_nextHop/README.md. VulDB advisories (https://vuldb.com/vuln/359540 and related pages) document the vulnerability, and the Tenda vendor site (https://www.tenda.com.cn/) provides a reference for checking firmware updates or mitigation guidance.
Details
- CWE(s)