What is the CVSS score of CVE-2026-2202?

CVE-2026-2202 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2026-2202?

Yes, a public proof-of-concept exploit is available for CVE-2026-2202. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2202?

Within 24 hours: Inventory all Tenda AC8 devices in the environment and isolate affected units from critical networks if possible. Within 7 days: Implement network segmentation to restrict management access to these devices and deploy WAF rules to block exploitation attempts against /goform/WifiGuestSet endpoints. Within 30 days: Develop a replacement strategy to upgrade to patched firmware versions or alternative equipment vendors, as this represents an unmitigated critical vulnerability.

Ac8 Firmware CVE-2026-2202

HIGH

Buffer Overflow (CWE-119)

2026-02-09 cna@vuldb.com

Buffer Overflow Tenda Ac8 Firmware

8.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Authenticate to Tenda AC8 web interface
Delivery

POST crafted request to /goform/WifiGuestSet
Exploit

Inject oversized shareSpeed parameter
Execution

Overflow buffer in fromSetWifiGusetBasic
Impact

Execute arbitrary code as httpd process

Vulnerability Assessment

Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Tenda AC8 running firmware version 16.03.33.05 with httpd service enabled; valid login credentials required to access /goform/WifiGuestSet endpoint; shareSpeed parameter must accept input exceeding allocated buffer in guest network configuration function.
Impact	CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker could exploit this flaw, buffer overflow.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Remote code execution in Tenda AC8 firmware 16.03.33.05 allows authenticated attackers to achieve full system compromise through a buffer overflow in the WiFi guest settings function. Public exploit code exists for this vulnerability, and no patch is currently available. The attack requires network access but minimal user interaction, making it a significant risk for exposed devices.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 8.8

A vulnerability was detected in Tenda AC8 16.03.33.05. Affected is the function fromSetWifiGusetBasic of the file /goform/WifiGuestSet of the component httpd. [CVSS 8.8 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-119 (Buffer Overflow). Affects Ac8 Firmware. A vulnerability was detected in Tenda AC8 16.03.33.05. Affected is the function fromSetWifiGusetBasic of the file /goform/WifiGuestSet of the component httpd. The manipulation of the argument shareSpeed results in buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Feb 10, 2026 - 15:07 vuln.today

Public exploit code

CVE Published

Feb 09, 2026 - 03:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was detected in Tenda AC8 16.03.33.05. Affected is the function fromSetWifiGusetBasic of the file /goform/WifiGuestSet of the component httpd. The manipulation of the argument shareSpeed results in buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

Executive ViewAI

Why It Matters

A critical remote code execution vulnerability affects Tenda AC8 wireless routers (firmware 16.03.33.05) with no vendor patch currently available. Organizations using this equipment face immediate risk of network compromise, unauthorized access, and potential lateral movement into connected systems, as public exploits are already available.

Business Impact: High

Compensating Controls

Implement network segmentation to isolate affected Tenda AC8 devices from critical infrastructure; deploy WAF rules to block HTTP requests to /goform/WifiGuestSet; restrict administrative access via IP whitelisting; disable guest network functionality if not required; monitor for suspicious activity targeting these endpoints; consider disabling httpd service if device can operate without web management interface.

Threat Intelligence Overview

EPSS Score

0.1%

Top 76% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.