What is CVE-2023-40799?

CVE-2023-40799 is a critical-severity vulnerability in Tenda Ac23, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-08-25.

How severe is CVE-2023-40799?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Tenda Ac23

CVE-2023-40799

Tenda AC23 Vv16.03.07.45_cn is vulnerable to Buffer Overflow via sub_450A4C function.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% 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-787 — Out-of-bounds Write

References

github.com/lst-oss/Vulnerability/blob/main/Tenda/AC23/sub_450A4C (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-40799?: CVE-2023-40799 is a critical-severity vulnerability in Tenda Ac23, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-08-25.
How severe is CVE-2023-40799?: Critical severity. CVSS v3 base score is 9.8 out of 10.