EUVD-2026-21758
GHSA-f23m-grxv-hrqj
CVSS Vector
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
Lifecycle Timeline
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Description
A vulnerability was detected in Tenda F451 1.0.0.7_cn_svn7958. The affected element is the function fromAdvSetWan of the file /goform/AdvSetWan. The manipulation of the argument wanmode/PPPOEPassword results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.
Analysis
Stack-based buffer overflow in Tenda F451 router firmware 1.0.0.7_cn_svn7958 allows authenticated remote attackers to achieve complete system compromise (confidentiality, integrity, availability breach) via malformed ADSL/WAN configuration parameters. The vulnerability resides in the fromAdvSetWan function handling wanmode and PPPOEPassword arguments. …
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Remediation
Within 24 hours: Identify all Tenda F451 devices running firmware 1.0.0.7_cn_svn7958 in your network and document their locations and access controls. Within 7 days: Restrict network access to router management interfaces using firewall rules, VPN-only administration, and strong authentication mechanisms; check Tenda's advisory for firmware updates beyond 1.0.0.7_cn_svn7958. …
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External POC / Exploit Code
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