What is CVE-2021-44620?

CVE-2021-44620 is a critical-severity vulnerability in Totolink A3100r, classified under Command Injection. CVSS score: 9.8/10. Published 2022-03-11.

How severe is CVE-2021-44620?

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

RCE in Totolink A3100r

CVE-2021-44620

A Command Injection vulnerability exits in TOTOLINK A3100R <=V4.1.2cu.5050_B20200504 in adm/ntm.asp via the hosTime parameters.

Vulnerability class: Command Injection (OS Command Injection)

Published 2022-03-11 · last modified 2026-07-09.

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: 0.013 (70.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-77 — Command Injection

References

af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Broken Link)
drive.google.com/file/d/1_9ru2GRZ13T1KQKXPq2E14-opgf9ih45/view (Broken Link)
www.totolink.net/home/menu/newstpl/menu_newstpl/products/id/170.html (Product, Vendor Advisory)

Frequently asked questions

What is CVE-2021-44620?: CVE-2021-44620 is a critical-severity vulnerability in Totolink A3100r, classified under Command Injection. CVSS score: 9.8/10. Published 2022-03-11.
How severe is CVE-2021-44620?: Critical severity. CVSS v3 base score is 9.8 out of 10.