Buffer overflow in Tenda F1202
CVE-2026-9431
A vulnerability was identified in Tenda F1202 1.2.0.20(408). This affects the function fromPptpUserAdd of the file /goform/PptpUserAdd. The manipulation of the argument opttype 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: 0.008 (55.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.5% 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 F1202 — versions 1.2.0.20(408)
Weakness classification (CWE)
References
- vuldb.com/vuln/365412 (technical-description, vdb-entry)
- vuldb.com/vuln/365412/cti (signature, permissions-required)
- vuldb.com/submit/813916 (third-party-advisory)
- github.com/Litengzheng/vuldb_new2/blob/main/F1202/vul_35/README.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-9431?
- CVE-2026-9431 is a high-severity vulnerability in Tenda F1202, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-05-25.
- How severe is CVE-2026-9431?
- High severity. CVSS v3 base score is 8.8 out of 10.