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%.

Which versions of Ac8 Firmware are affected by CVE-2026-2202?

A critical remote code execution vulnerability affects Tenda AC8 wireless routers (firmware 16.03.33.05) with no vendor patch currently available.

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 Ac8 Firmware

8.8

CVSS 3.1 · NVD

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

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.

AnalysisAI

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. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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

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 AssessmentAI

Exploitation	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. Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 8.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker could exploit this flaw, buffer overflow.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Inventory all Tenda AC8 devices in the environment and isolate affected units from critical networks if possible. …

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

CVE-2026-2202 vulnerability details – vuln.today

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Ac8 Firmware CVE-2026-2202

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

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External POC / Exploit Code