Buffer overflow in Tenda Cx12l
CVE-2026-5685
A vulnerability was identified in Tenda CX12L 16.03.53.12. This affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might 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 (62.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Tenda Cx12l — versions 16.03.53.12
- Tenda Cx12l Firmware — versions 16.03.53.12
Weakness classification (CWE)
References
- vuldb.com/vuln/355512 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/355512/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/792782 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/cve-a/lvdan/issues/3 (issue-tracking, Exploit, Third Party Advisory, exploit, Mitigation, Issue Tracking)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2026-5685?
- CVE-2026-5685 is a high-severity vulnerability in Tenda Cx12l, 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-2026-5685?
- High severity. CVSS v3 base score is 8.8 out of 10.