EUVD-2026-58584
GHSA-hhjm-g2c9-8gpf
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
Network-reachable management interface requires low-privilege authentication (PR:L); full triad impact confined to the router itself with no scope change (S:U).
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
5DescriptionCVE.org
A weakness has been identified in Tenda G0 up to 20260625. The affected element is the function addStaticRoute of the file /goform/module of the component httpd web management interface. Executing a manipulation of the argument staticRouteNet can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.
AnalysisAI
Stack-based buffer overflow in the Tenda G0 router's httpd web management interface allows low-privileged remote attackers to corrupt stack memory by sending a crafted staticRouteNet argument to the /goform/module endpoint, potentially enabling arbitrary code execution on the device. All firmware versions up to and including build 20260625 are confirmed affected. A public proof-of-concept exploit is available on GitHub, materially elevating practical risk; however, no CISA KEV listing has been identified, indicating active exploitation is not yet confirmed at scale.
Technical ContextAI
The Tenda G0 is a consumer/SMB-class router whose firmware includes an embedded httpd web management server. The vulnerable code path resides in the addStaticRoute function at the /goform/module route handler (CPE: cpe:2.3:a:tenda:g0:*:*:*:*:*:*:*:*). CWE-121 (Stack-Based Buffer Overflow) identifies the root cause: the function copies the attacker-supplied staticRouteNet HTTP parameter into a fixed-size stack buffer without validating the input length, allowing adjacent stack memory - including saved return addresses and frame pointers - to be overwritten. Embedded MIPS/ARM router firmware frequently lacks modern exploit mitigations such as ASLR, stack canaries, and NX, which means stack overflows on these devices carry a higher-than-average probability of reliable code execution compared to hardened operating systems.
RemediationAI
No vendor-released patch has been confirmed from available data - Tenda's website (https://www.tenda.com.cn/) should be monitored for firmware updates and checked against the affected build date of 20260625. As an immediate compensating control, disable WAN-side access to the httpd web management interface in the router's remote management settings; this prevents internet-exposed exploitation but does not eliminate LAN-side risk. Restrict access to the management interface (typically TCP 80 and 443) to a specific trusted management VLAN or host-based ACL if the router supports it. If network segmentation is feasible, place the device behind a firewall that blocks external access to management ports. Note that disabling remote management will prevent out-of-band administration. If replacement is operationally viable, migrating to a device with an active security patch lifecycle is the most durable remediation given the absence of a confirmed fix.
Buffer overflow in the Tenda G0 router's httpd web management interface allows authenticated remote attackers to corrupt
Stack-based buffer overflow in the Tenda G0 router's httpd web management interface allows network-adjacent or remote au
Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today