CVE-2026-7470
Published: 30 April 2026
Summary
CVE-2026-7470 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda 4G300 Firmware. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 40.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2026-7470 is a stack-based buffer overflow vulnerability in the Tenda 4G300 router running firmware version US_4G300V1.0Mt_V1.01.42_CN_TDC01. The flaw resides in the sub_427C3C function within the /goform/SafeMacFilter file, triggered by manipulation of the "page" argument. This issue, classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow), was published on 2026-04-30 and carries 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).
Attackers with low privileges, such as authenticated users on the network, can remotely exploit this vulnerability over the network with low complexity and no user interaction required. Successful exploitation enables high-impact confidentiality, integrity, and availability violations, potentially leading to full device compromise, including arbitrary code execution.
Advisories from VulDB (vuln/360206) and a related GitHub repository detail the vulnerability and provide a published exploit for the sub_427C3C function. Security practitioners should consult the vendor's site at tenda.com.cn for any firmware updates or mitigation guidance, as remote exploitation is feasible.
The exploit's public availability on GitHub increases the risk of real-world attacks against unpatched Tenda 4G300 devices.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-26307
Vulnerability details
A flaw has been found in Tenda 4G300 US_4G300V1.0Mt_V1.01.42_CN_TDC01. Affected is the function sub_427C3C of the file /goform/SafeMacFilter. This manipulation of the argument page causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published…
more
and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in router web interface (/goform/SafeMacFilter) allows remote exploitation by low-privilege authenticated users leading to arbitrary code execution and full device compromise.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly addresses the buffer overflow by requiring timely identification, reporting, and patching of the specific flaw in the Tenda router firmware.
Requires validation of inputs like the 'page' argument at the /goform/SafeMacFilter interface to prevent stack-based buffer overflows.
Implements memory safeguards such as stack canaries or DEP to protect against exploitation of the stack buffer overflow even if unpatched.