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 buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.008 (56.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.008 · change: +0.002
Affected products
- Tenda Ac8 — versions 16.03.33.05
- Tenda Ac8 Firmware — versions 16.03.33.05
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsett… (related, Exploit, Third Party Advisory)
- github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/AC8/fastsett… (Exploit, Third Party Advisory, exploit)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2026-2203?
- CVE-2026-2203 is a high-severity vulnerability in Tenda Ac8, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. 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.