CVE-2026-5036
Published: 29 March 2026
Summary
CVE-2026-5036 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda 4G06 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 42.2th 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-16 (Memory Protection).
Deeper analysis
CVE-2026-5036 is a stack-based buffer overflow vulnerability affecting the Tenda 4G06 router on firmware version 04.06.01.29. The flaw exists in the fromDhcpListClient function of the /goform/DhcpListClient file within the Endpoint component. It is triggered by manipulating the "page" argument, as documented in the CVE description published on 2026-03-29.
The vulnerability 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) and is associated with CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow). It can be exploited remotely by an attacker with low privileges, requiring low complexity and no user interaction. Successful exploitation enables high-impact consequences on confidentiality, integrity, and availability.
Advisories reference a public exploit, including a GitHub issue at https://github.com/Kiciot/cve/issues/1 and VulDB entries at https://vuldb.com/vuln/353962 and related pages. The Tenda vendor site is listed at https://www.tenda.com.cn/ for potential updates. The exploit has been made public and could be used.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-16981
Vulnerability details
A vulnerability was found in Tenda 4G06 04.06.01.29. This vulnerability affects the function fromDhcpListClient of the file /goform/DhcpListClient of the component Endpoint. Performing a manipulation of the argument page results in stack-based buffer overflow. The attack can be initiated remotely.…
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The exploit has been made public and could be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in internet-facing router web endpoint (/goform/DhcpListClient) allows remote authenticated low-priv RCE with full CIA impact, directly mapping to exploitation of public-facing apps and privilege escalation via memory corruption.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-2 requires timely remediation of identified flaws like this stack-based buffer overflow via firmware patching from the Tenda vendor.
SI-10 mandates validation of inputs such as the 'page' argument to prevent buffer overflows by enforcing bounds and type checks.
SI-16 implements memory protections like stack canaries and DEP to mitigate exploitation of stack-based buffer overflows.