Buffer overflow in Tenda W20e
CVE-2026-90688
A vulnerability was identified in Tenda W20E 15.11.0.61068_1546_841_CN_TDC. This issue affects the function formIPMacBindAdd of the component HTTP Handler. Such manipulation of the argument IPMacBindRule leads to stack-based buffer overflow. It is possible to launch the attack remotely.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Tenda W20e — versions 15.11.0.61068_1546_841_CN_TDC
Weakness classification (CWE)
References
- vuldb.com/vuln/403221 (technical-description, vdb-entry)
- vuldb.com/vuln/403221/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90688 (third-party-advisory)
- vuldb.com/submit/914958 (third-party-advisory)
- github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/Tenda/… (related)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-90688?
- CVE-2026-90688 is a medium-severity vulnerability in Tenda W20e, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2026-09-14.
- How severe is CVE-2026-90688?
- Medium severity. CVSS v3 base score is 6.5 out of 10.