What is CVE-2022-40865?

CVE-2022-40865 is a critical-severity vulnerability in Tendacn Ac15, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-09-23.

How severe is CVE-2022-40865?

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

Buffer overflow in Tendacn Ac15

CVE-2022-40865

Tenda AC15 and AC18 routers V15.03.05.19 contain heap overflow vulnerabilities in the function setSchedWifi with the request /goform/openSchedWifi/

Vulnerability class: Buffer Overflow

Published 2022-09-23 · 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: 0.014 (72.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.014 · change: +0.002

Affected products

Tendacn Ac15
Tendacn Ac15 Firmware — versions 15.03.05.19
Tendacn Ac18
Tendacn Ac18 Firmware — versions 15.03.05.19

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/CPSeek/Router-vuls/blob/main/Tenda/AC15/setSchedWifi.md (Exploit, Third Party Advisory)
github.com/CPSeek/Router-vuls/blob/main/Tenda/AC18/setSchedWifi.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40865?: CVE-2022-40865 is a critical-severity vulnerability in Tendacn Ac15, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-09-23.
How severe is CVE-2022-40865?: Critical severity. CVSS v3 base score is 9.8 out of 10.