Buffer overflow in Tenda I12
CVE-2026-5609
A flaw has been found in Tenda i12 1.0.0.11(3862). Affected by this vulnerability is the function formwrlSSIDset of the file /goform/wifiSSIDset of the component Parameter Handler. This manipulation of the argument index/wl_radio causes stack-based buffer overflow. It is possible to initiate the attack remotely. 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: 0.010 (61.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.6% 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: 0.010 · change: +0.004
Affected products
- Tenda I12 — versions 1.0.0.11(3862)
- Tenda I12 Firmware — versions 1.0.0.11(3862), 1.0.0.11\(3862\)
Weakness classification (CWE)
References
- vuldb.com/vuln/355400 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/355400/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/785337 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Litengzheng/vuldb_new/blob/main/i12/vul_107/README.md (Exploit, Third Party Advisory, exploit)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2026-5609?
- CVE-2026-5609 is a high-severity vulnerability in Tenda I12, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-04-06.
- How severe is CVE-2026-5609?
- High severity. CVSS v3 base score is 8.8 out of 10.