Which versions of Tenda are affected by CVE-2026-5605?

Tenda CH22 router firmware version 1.0.0.1 contains a stack-based buffer overflow vulnerability (CVSS 8.8) that allows authenticated attackers to execute arbitrary code on affected devices.

Is there a public PoC exploit available for CVE-2026-5605?

Yes, a public proof-of-concept exploit is available for CVE-2026-5605. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-5605?

Within 24 hours: Identify all Tenda CH22 devices running firmware 1.0.0.1 in your environment and document their network locations and connected services. Within 7 days: Restrict network access to the /goform/WrlExtraSet endpoint using firewall rules, disable remote administration capabilities on affected devices, and change all default/weak administrative credentials. Within 30 days: Contact Tenda for patch availability and timeline; if no patch is released, evaluate replacement with patched router models or disable affected devices until vendor remediation is available.

Tenda CVE-2026-5605

Q: What is the CVSS score of CVE-2026-5605?

CVE-2026-5605 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%.

EUVD-2026-19140 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-04-05 VulDB

Tenda Buffer Overflow Stack Overflow

7.4

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

PoC Detected

Apr 07, 2026 - 13:20 vuln.today

Public exploit code

EUVD ID Assigned

Apr 05, 2026 - 23:30 euvd

EUVD-2026-19140

Analysis Generated

Apr 05, 2026 - 23:30 vuln.today

CVE Published

Apr 05, 2026 - 23:15 nvd

HIGH 7.4

DescriptionCVE.org

A weakness has been identified in Tenda CH22 1.0.0.1. This affects the function formWrlExtraSet of the file /goform/WrlExtraSet. Executing a manipulation of the argument GO 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 Tenda CH22 router firmware version 1.0.0.1 allows authenticated remote attackers to achieve arbitrary code execution via the formWrlExtraSet function. The vulnerability resides in the /goform/WrlExtraSet endpoint where manipulation of the 'GO' parameter triggers memory corruption. …

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Risk assessment & exploitation conditions
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate to Tenda CH22 device

Delivery

Send crafted HTTP request to /goform/WrlExtraSet

Exploit

Manipulate GO parameter with oversized payload

Execution

Trigger stack-based buffer overflow

Impact

Execute arbitrary code with device privileges

Access

Authenticate to Tenda CH22 device

Delivery

Send crafted HTTP request to /goform/WrlExtraSet

Exploit

Manipulate GO parameter with oversized payload

Execution

Trigger stack-based buffer overflow

Impact

Execute arbitrary code with device privileges

Vulnerability AssessmentAI

Exploitation	Requires authenticated access to Tenda CH22 router firmware 1.0.0.1. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	Real-world risk is HIGH despite requiring authentication (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An external attacker performs reconnaissance scanning to identify Tenda CH22 routers exposed on the internet or targets a specific organization known to use this model. Using credential stuffing, default password exploitation, or prior compromise, the attacker authenticates to the router's web administration interface with low-privileged credentials. …
Remediation	No vendor-released patch identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all Tenda CH22 devices running firmware 1.0.0.1 in your environment and document their network locations and connected services. …

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-5605 vulnerability details – vuln.today

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Tenda CVE-2026-5605

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

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External POC / Exploit Code