What is CVE-2023-40802?

CVE-2023-40802 is a medium-severity vulnerability in Tenda Ac23, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-08-25.

How severe is CVE-2023-40802?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Tenda Ac23

CVE-2023-40802

The get_parentControl_list_Info function does not verify the parameters entered by the user, causing a post-authentication heap overflow vulnerability in Tenda AC23 v16.03.07.45_cn

Vulnerability class: Buffer Overflow

Published 2023-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.6th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Tenda Ac23
Tenda Ac23 Firmware — versions 16.03.07.45_cn

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/lst-oss/Vulnerability/tree/main/Tenda/AC23/get_parentControl_list_In… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-40802?: CVE-2023-40802 is a medium-severity vulnerability in Tenda Ac23, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-08-25.
How severe is CVE-2023-40802?: Medium severity. CVSS v3 base score is 6.5 out of 10.