What is CVE-2022-40861?

CVE-2022-40861 is a high-severity vulnerability in Tenda Ac18, classified under Out-of-bounds Write. CVSS score: 7.2/10. Published 2022-09-23.

How severe is CVE-2022-40861?

High severity. CVSS v3 base score is 7.2 out of 10.

Buffer overflow in Tenda Ac18

CVE-2022-40861

Tenda AC18 router V15.03.05.19 contains a stack overflow vulnerability in the formSetQosBand->FUN_0007db78 function with the request /goform/SetNetControlList/

Vulnerability class: Buffer Overflow

Published 2022-09-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-10-05.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.011 · change: +0.001

Affected products

Tenda Ac18
Tenda Ac18 Firmware — versions 15.03.05.19\(6318\), 15.03.05.19(6318)

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2022-40861?: CVE-2022-40861 is a high-severity vulnerability in Tenda Ac18, classified under Out-of-bounds Write. CVSS score: 7.2/10. Published 2022-09-23.
How severe is CVE-2022-40861?: High severity. CVSS v3 base score is 7.2 out of 10.