Buffer overflow in Tenda F456
CVE-2026-9389
A security vulnerability has been detected in Tenda F456 1.0.0.5. This affects the function frmL7ImForm of the file /goform/L7Im. The manipulation of the argument page leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed publicly 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 (54.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.008 · change: +0.004
Affected products
- Tenda F456 — versions 1.0.0.5
Weakness classification (CWE)
References
- vuldb.com/vuln/365352 (technical-description, vdb-entry)
- vuldb.com/vuln/365352/cti (signature, permissions-required)
- vuldb.com/submit/813444 (third-party-advisory)
- github.com/Litengzheng/vuldb_new/blob/main/F456/vul_2/README.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-9389?
- CVE-2026-9389 is a high-severity vulnerability in Tenda F456, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-05-24.
- How severe is CVE-2026-9389?
- High severity. CVSS v3 base score is 8.8 out of 10.