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. The exploit has been made available to the public and could be used for attacks.
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: 0.034 (88.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.034 · change: +0.003
Affected products
- Tenda Ac23 — versions 16.03.07.52
- Tenda Ac23 Firmware — versions 16.03.07.52
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/xyh4ck/iot_poc/blob/main/Tenda AC23_Buffer_Overflow/Tenda AC23_Buffe… (Exploit, Third Party Advisory, exploit, broken-link)
- github.com/xyh4ck/iot_poc/blob/main/Tenda AC23_Buffer_Overflow/Tenda AC23_Buffe… (Exploit, Third Party Advisory, exploit, broken-link)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2026-0640?
- CVE-2026-0640 is a high-severity vulnerability in Tenda Ac23, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. 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.