Buffer overflow in Tenda Ac5
CVE-2026-105778
A vulnerability has been found in Tenda AC5 02.03.01.111_multi. Affected by this issue is some unknown functionality of the file /goform/setWifi of the component Wifi Handler. Such manipulation of the argument wifiPwd leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/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 Ac5 — versions 02.03.01.111_multi
Weakness classification (CWE)
References
- vuldb.com/vuln/413811 (technical-description, vdb-entry)
- vuldb.com/vuln/413811/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-105778 (third-party-advisory)
- vuldb.com/submit/992587 (third-party-advisory)
- github.com/raisecnull/Tenda-AC5v3-BOF/blob/main/blog.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-105778?
- CVE-2026-105778 is a critical-severity vulnerability in Tenda Ac5, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-10-06.
- How severe is CVE-2026-105778?
- Critical severity. CVSS v3 base score is 9.9 out of 10.