What is CVE-2022-29638?

CVE-2022-29638 is a high-severity vulnerability in Totolink A3100r, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2022-05-18.

How severe is CVE-2022-29638?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Totolink A3100r

CVE-2022-29638

TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 were discovered to contain a stack overflow via the comment parameter in the function setIpQosRules. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted POST request.

Vulnerability class: Buffer Overflow

Published 2022-05-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (65.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.8% 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: 0.012 · change: 0.000

Affected products

Totolink A3100r
Totolink A3100r Firmware — versions 4.1.2cu.5050_b20200504, 4.1.2cu.5247_b20211129

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/shijin0925/IOT/blob/master/TOTOLINK A3100R/2.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-29638?: CVE-2022-29638 is a high-severity vulnerability in Totolink A3100r, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2022-05-18.
How severe is CVE-2022-29638?: High severity. CVSS v3 base score is 7.5 out of 10.