EUVD-2026-35180Severity 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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
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
5DescriptionCVE.org
A weakness has been identified in Tenda F451 1.0.0.7/1.0.0.9. The affected element is the function fromNatlimit of the file /goform/Natlimit of the component Web Management Interface. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks.
AnalysisAI
Stack-based buffer overflow in the Tenda F451 router (firmware 1.0.0.7 and 1.0.0.9) Web Management Interface allows remote authenticated attackers to corrupt memory by sending a crafted 'page' argument to the fromNatlimit handler at /goform/Natlimit. Publicly available exploit code exists, raising practical risk for exposed or LAN-reachable devices, though no public exploit identified as actively used in CISA KEV at time of analysis.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must have network reachability to the device's Web Management Interface (HTTP admin daemon) and valid low-privileged credentials to authenticate before invoking /goform/Natlimit (CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.4 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) reflects network reachability, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability, but requires low privileges (PR:L) - meaning a valid admin/management credential is needed, which sharply limits internet-scale exploitation against properly configured devices. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained or guessed a low-privileged administrator credential (or reached an exposed management interface with default credentials) sends a crafted HTTP request to /goform/Natlimit with an oversized 'page' parameter. The fromNatlimit function copies the value onto the stack without bounds checking, overwriting the saved return address; the publicly posted PoC at the Robots10/IoT_vlu repository demonstrates the crash and parameter shape, providing a direct foothold for further weaponization on these embedded targets. |
| Remediation | No vendor-released patch identified at time of analysis; monitor https://www.tenda.com.cn/ and the VulDB entry at https://vuldb.com/cve/CVE-2026-11557 for a firmware update covering versions beyond 1.0.0.9. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Tenda F451 devices and identify firmware versions; implement firewall rules restricting management interface access to authorized administrator subnets only. …
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