Which versions of Tenda are affected by EUVD-2026-22063?

CVE-2026-6199 is a stack buffer overflow in Tenda F456 router firmware (version 1.0.0.5) that allows authenticated attackers to completely compromise affected devices through the QoS configuration…

Is there a public PoC exploit available for EUVD-2026-22063?

Yes, a public proof-of-concept exploit is available for EUVD-2026-22063. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate EUVD-2026-22063?

Within 24 hours: Identify all Tenda F456 routers running firmware 1.0.0.5 in your environment and document locations. Verify if vendor has released a patched firmware version beyond 1.0.0.5 (check Tenda support portal). Within 7 days: Restrict administrative access to the router web interface to a small set of authorized personnel; implement network segmentation to limit device access. Within 30 days: Deploy a firmware update if available from Tenda; if unavailable, evaluate replacement with a supported device or implement compensating controls (reverse proxy with authentication hardening, IP whitelisting for management access).

Tenda EUVD-2026-22063

Q: What is the CVSS score of EUVD-2026-22063?

EUVD-2026-22063 has a CVSS 4.0 base score of 7.4 (High). 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. EPSS exploitation probability: 0.0%.

| CVE-2026-6199 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-04-13 VulDB

GHSA-8977-93px-wpcg

Buffer Overflow Stack Overflow Tenda

7.4

CVSS 4.0

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Re-analysis Queued

Apr 22, 2026 - 20:37 vuln.today

cvss_changed

PoC Detected

Apr 22, 2026 - 20:23 vuln.today

Public exploit code

Analysis Generated

Apr 15, 2026 - 12:33 vuln.today

CVSS changed

Apr 13, 2026 - 19:37 NVD

8.8 (HIGH) 7.4 (HIGH)

EUVD ID Assigned

Apr 13, 2026 - 18:56 euvd

EUVD-2026-22063

Analysis Generated

Apr 13, 2026 - 18:56 vuln.today

CVE Published

Apr 13, 2026 - 18:30 nvd

HIGH 7.4

DescriptionNVD

A vulnerability was found in Tenda F456 1.0.0.5. Impacted is the function fromqossetting of the file /goform/qossetting. The manipulation of the argument page results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used.

AnalysisAI

Stack-based buffer overflow in Tenda F456 router firmware 1.0.0.5 allows authenticated remote attackers to achieve complete device compromise via crafted input to the 'page' parameter in the fromqossetting QoS configuration handler. Publicly available exploit code exists (GitHub POC), CVSS 7.4 (High), EPSS 0.05% (low exploitation probability). …

RemediationAI

Within 24 hours: Identify all Tenda F456 routers running firmware 1.0.0.5 in your environment and document locations. Verify if vendor has released a patched firmware version beyond 1.0.0.5 (check Tenda support portal). …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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EUVD-2026-22063 vulnerability details – vuln.today

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Tenda EUVD-2026-22063

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Tenda EUVD-2026-22063

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External POC / Exploit Code