Buffer overflow in Tenda Ac9
CVE-2026-104611
A vulnerability was detected in Tenda AC9 15.03.02.13. Affected is an unknown function of the file /goform/fast_setting_internet_set of the component POST Request Handler. Performing a manipulation of the argument netWanType results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Tenda Ac9 — versions 15.03.02.13
Weakness classification (CWE)
References
- vuldb.com/vuln/412918 (technical-description, vdb-entry)
- vuldb.com/vuln/412918/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-104611 (third-party-advisory)
- vuldb.com/submit/962720 (third-party-advisory)
- github.com/ZaneBoden/CVEs/blob/main/Tenda-AC9-fast_setting_internet_set.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-104611?
- CVE-2026-104611 is a critical-severity vulnerability in Tenda Ac9, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.1/10. Published 2026-10-02.
- How severe is CVE-2026-104611?
- Critical severity. CVSS v3 base score is 9.1 out of 10.