What is CVE-2021-46008?

CVE-2021-46008 is a high-severity vulnerability in Totolink A3100r, classified under Use of Hard-coded Credentials. CVSS score: 8.8/10. Published 2022-03-30.

How severe is CVE-2021-46008?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Totolink A3100r

CVE-2021-46008

In totolink a3100r V5.9c.4577, the hard-coded telnet password can be discovered from official released firmware. An attacker, who has connected to the Wi-Fi, can easily telnet into the target with root shell if the telnet is function turned on.

Published 2022-03-30 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Totolink A3100r
Totolink A3100r Firmware — versions 5.9c.4577

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Broken Link)
hackmd.io/ZkeEB-VvRiWBS53rFKG8DQ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-46008?: CVE-2021-46008 is a high-severity vulnerability in Totolink A3100r, classified under Use of Hard-coded Credentials. CVSS score: 8.8/10. Published 2022-03-30.
How severe is CVE-2021-46008?: High severity. CVSS v3 base score is 8.8 out of 10.