What is CVE-2023-40798?

CVE-2023-40798 is a high-severity vulnerability in Tenda Ac23, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2023-08-25.

How severe is CVE-2023-40798?

High severity. CVSS v3 base score is 8.8 out of 10.

Improper input validation in Tenda Ac23

CVE-2023-40798

In Tenda AC23 v16.03.07.45_cn, the formSetIPv6status and formGetWanParameter functions do not authenticate user input parameters, resulting in a post-authentication stack overflow vulnerability.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

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

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: 0.009 (59.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Tenda Ac23
Tenda Ac23 Firmware — versions 16.03.07.45_cn

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/lst-oss/Vulnerability/tree/main/Tenda/AC23/formSetIPv6status-formGet… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-40798?: CVE-2023-40798 is a high-severity vulnerability in Tenda Ac23, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2023-08-25.
How severe is CVE-2023-40798?: High severity. CVSS v3 base score is 8.8 out of 10.