Buffer overflow in Tenda Ac23
CVE-2026-0640
A weakness has been identified in Tenda AC23 16.03.07.52. This affects the function sscanf of the file /goform/PowerSaveSet. Executing a manipulation of the argument Time can lead to buffer overflow. The attack can be launched remotely. Th…
Vulnerability class: Buffer Overflow
EPSS: 0.003 (55.9th percentile) — read the EPSS interpretation.
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/E:P/RL:X/RC:R.
Affected products
- Tenda Ac23 — versions 16.03.07.52
Weakness classification (CWE)
References
- VDB-339683 | Tenda AC23 PowerSaveSet sscanf buffer overflow (vdb-entry, technical-description)
- VDB-339683 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #731772 | Tenda AC23 V16.03.07.52 Buffer Overflow (third-party-advisory)
- github.com/xyh4ck/iot_poc/blob/main/Tenda AC23_Buffer_Overflow/Tenda AC23_Buffe… (broken-link, exploit)
- github.com/xyh4ck/iot_poc/blob/main/Tenda AC23_Buffer_Overflow/Tenda AC23_Buffe… (broken-link, exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-0640?
- CVE-2026-0640 is a high-severity vulnerability in Tenda Ac23, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2026-01-06.
- How severe is CVE-2026-0640?
- High severity. CVSS v3 base score is 8.8 out of 10.