What is CVE-2022-29391?

CVE-2022-29391 is a critical-severity vulnerability in Totolink N600r, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-05-10.

How severe is CVE-2022-29391?

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

Is CVE-2022-29391 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Totolink N600r

CVE-2022-29391

TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the comment parameter in the function FUN_004200c8.

Vulnerability class: Buffer Overflow

Published 2022-05-10 · 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: 0.017 (75.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Totolink N600r
Totolink N600r Firmware — versions 4.3.0cu.7647_b20210106

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

github.com/d1tto/IoT-vuln/tree/main/Totolink/5.setStaticDhcpConfig (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-29391?: CVE-2022-29391 is a critical-severity vulnerability in Totolink N600r, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-05-10.
How severe is CVE-2022-29391?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-29391 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.