Vulnerability · Published Feb 9, 2026 · Assigned by VulDB
CVE-2026-2203Tenda AC8 Embedded Httpd Service fast_setting_wifi_set buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in AC8 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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 buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · 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
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
- https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsettingwifiset-timezome.md related
- https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsettingwifiset-timezome.md#poc exploit
- https://www.tenda.com.cn/ product