What is CVE-2022-26186?

CVE-2022-26186 is a critical-severity vulnerability in Totolink N600r, classified under Command Injection. CVSS score: 9.8/10. Published 2022-03-22.

How severe is CVE-2022-26186?

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

Is CVE-2022-26186 known to be exploited?

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

RCE in Totolink N600r

CVE-2022-26186

TOTOLINK N600R V4.3.0cu.7570_B20200620 was discovered to contain a command injection vulnerability via the exportOvpn interface at cstecgi.cgi.

Vulnerability class: Command Injection (OS Command Injection)

Published 2022-03-22 · 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: 0.039 (90.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000

Affected products

Totolink N600r
Totolink N600r Firmware — versions 4.3.0cu.7570_b20200620

Weakness classification (CWE)

CWE-77 — Command Injection

Public proof-of-concept exploits

References

doudoudedi.github.io/2022/02/21/TOTOLINK-N600R-Command-Injection/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-26186?: CVE-2022-26186 is a critical-severity vulnerability in Totolink N600r, classified under Command Injection. CVSS score: 9.8/10. Published 2022-03-22.
How severe is CVE-2022-26186?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-26186 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.