Buffer overflow in Tenda Ac8
CVE-2026-2203
A flaw has been found in Tenda AC8 16.03.33.05. Affected by this vulnerability is an unknown functionality of the file /goform/fast_setting_wifi_set of the component Embedded Httpd Service. This manipulation of the argument timeZone causes…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (29.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R.
Affected products
- Tenda Ac8 — versions 16.03.33.05
Weakness classification (CWE)
References
- VDB-344906 | Tenda AC8 Embedded Httpd Service fast_setting_wifi_set buffer overflow (vdb-entry, technical-description)
- VDB-344906 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #750226 | Tenda AC8 V16.03.33.05 Denial of Service (third-party-advisory)
- github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsett… (related)
- github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsett… (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-2203?
- CVE-2026-2203 is a high-severity vulnerability in Tenda Ac8, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2026-02-09.
- How severe is CVE-2026-2203?
- High severity. CVSS v3 base score is 8.8 out of 10.