Buffer overflow in Tenda F456
CVE-2026-6199
A vulnerability was found in Tenda F456 1.0.0.5. Impacted is the function fromqossetting of the file /goform/qossetting. The manipulation of the argument page results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could 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 (54.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.003
Affected products
- Tenda F456 — versions 1.0.0.5
Weakness classification (CWE)
References
- vuldb.com/vuln/357121 (technical-description, vdb-entry)
- vuldb.com/vuln/357121/cti (signature, permissions-required)
- vuldb.com/submit/797471 (third-party-advisory)
- github.com/Litengzheng/vuldb_new/blob/main/F456/vul_116/README.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-6199?
- CVE-2026-6199 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 2026-04-13.
- How severe is CVE-2026-6199?
- High severity. CVSS v3 base score is 8.8 out of 10.