High severity · published Feb 9, 2026
CVE-2026-2203
Tenda AC8 Embedded Httpd Service fast_setting_wifi_set buffer overflow
8.8
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC8 · Tenda
16.03.33.05 · source: vendor
AF
Ac8 Firmware · Tenda
16.03.33.05 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2203
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2203
Exploit
https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsettingwifiset-timezome.md
Exploit
https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsettingwifiset-timezome.md#poc
Permissions Required
https://vuldb.com/?ctiid.344906
Third Party Advisory
https://vuldb.com/?id.344906
Third Party Advisory
https://vuldb.com/?submit.750226
Product
https://www.tenda.com.cn/
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