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 Tenda 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

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. The attack requires network access but minimal user interaction, making it a significant risk for exposed devices.

Technical ContextAI

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.

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.