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Tenda CX12L CVE-2026-5684

| EUVD-2026-19514 HIGH
Stack-based Buffer Overflow (CWE-121)
2026-04-06 VulDB GHSA-phcm-xmm8-7jpc
Buffer Overflow Stack Overflow Tenda
7.3
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:A/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
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

7
Analysis Updated
Apr 29, 2026 - 01:32 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Apr 29, 2026 - 01:11 vuln.today
cvss_changed
CVSS changed
Apr 29, 2026 - 01:11 NVD
8.6 (HIGH) 7.3 (HIGH)
PoC Detected
Apr 07, 2026 - 13:20 vuln.today
Public exploit code
EUVD ID Assigned
Apr 06, 2026 - 21:46 euvd
EUVD-2026-19514
Analysis Generated
Apr 06, 2026 - 21:46 vuln.today
CVE Published
Apr 06, 2026 - 21:15 nvd
HIGH 8.6

DescriptionNVD

A vulnerability was determined in Tenda CX12L 16.03.53.12. Affected by this issue is the function fromwebExcptypemanFilter of the file /goform/webExcptypemanFilter. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The attack requires access to the local network. The exploit has been publicly disclosed and may be utilized.

AnalysisAI

Stack-based buffer overflow in Tenda CX12L wireless router firmware 16.03.53.12 allows authenticated adjacent network attackers to execute arbitrary code or crash the device via crafted 'page' parameter to the /goform/webExcptypemanFilter endpoint. Publicly available exploit code exists (GitHub POC published), enabling straightforward exploitation against unpatched routers on the same LAN segment. …

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RemediationAI

Within 24 hours: Audit network inventory to identify all Tenda CX12L devices and document firmware versions; check Tenda support portal for firmware updates beyond 16.03.53.12. Within 7 days: Isolate any CX12L devices running firmware 16.03.53.12 to a segregated VLAN or replace with patched alternatives; restrict administrative access to local network only. …

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CVE-2026-5684 vulnerability details – vuln.today
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