EUVD-2026-40016
GHSA-q964-w32c-4cr5
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Remotely reachable web endpoint (AV:N/AC:L) but requires low-privilege authentication to the admin UI (PR:L); stack overflow enables code execution with full C/I/A impact on the device.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
5DescriptionCVE.org
A vulnerability was found in Tenda JD12L 16.03.53.23. This impacts the function fromNatStaticSetting of the file /goform/NatStaticSetting. The manipulation of the argument page results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.
AnalysisAI
Stack-based buffer overflow in the Tenda JD12L router (firmware 16.03.53.23) lets remote attackers corrupt memory via the 'page' parameter handled by the fromNatStaticSetting function at the /goform/NatStaticSetting endpoint. Publicly available exploit code exists, and the CVSS 4.0 vector (PR:L) indicates an authenticated user on the device's web interface can trigger high confidentiality, integrity and availability impact. There is no public exploit identified as actively used in the wild - exploitation is proof-of-concept only at this time.
Technical ContextAI
The affected component is the embedded web management server (httpd/goform handler) of the Tenda JD12L, a consumer/SOHO networking device, identified by CPE cpe:2.3:a:tenda:jd12l:*:*:*:*:*:*:*:*. The root cause is CWE-121 (Stack-based Buffer Overflow): the fromNatStaticSetting routine that processes NAT static-routing configuration copies the attacker-controlled 'page' argument into a fixed-size stack buffer without adequate bounds checking. Tenda's goform handlers are a well-known pattern for these flaws, typically using unsafe string operations (e.g., strcpy/sprintf) on HTTP request parameters, allowing the saved return address or adjacent stack data to be overwritten.
RemediationAI
No vendor-released patch is identified at time of analysis; Tenda has not published a fixed firmware version in the available data, so monitor https://www.tenda.com.cn/ for an updated build and apply it once released. As compensating controls, restrict access to the device's web management interface to trusted management VLANs or hosts and disable remote/WAN-side administration so the /goform/NatStaticSetting endpoint is not reachable from untrusted networks (trade-off: remote management convenience is lost). Change default and weak administrator credentials, since exploitation requires low-privilege authentication (PR:L), and place the device behind a firewall that blocks inbound access to its HTTP(S) admin port. Reference the disclosure at https://vuldb.com/cve/CVE-2026-13519; the public PoC is at https://github.com/cve-a/Yuanji-Wanshu/issues/1.
Stack-based buffer overflow in the Tenda JD12L router (firmware 16.03.53.23) lets a remote attacker corrupt memory by ma
Stack-based buffer overflow in the Tenda JD12L router (firmware 16.03.53.23) allows remote attackers to corrupt memory b
Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today