What is CVE-2021-42889?

CVE-2021-42889 is a high-severity vulnerability in Totolink Ex1200t, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2022-06-03.

How severe is CVE-2021-42889?

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

Is CVE-2021-42889 known to be exploited?

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

Auth bypass in Totolink Ex1200t

CVE-2021-42889

In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can obtain sensitive information (wifikey, wifiname, etc.) without authorization.

Vulnerability class: Broken Authentication

Published 2022-06-03 · 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:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.014 (71.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Totolink Ex1200t
Totolink Ex1200t Firmware — versions 4.1.2cu.5215

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

References

github.com/p1Kk/vuln/blob/main/totolink_ex1200t_getWiFiApConfig_leak.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-42889?: CVE-2021-42889 is a high-severity vulnerability in Totolink Ex1200t, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2022-06-03.
How severe is CVE-2021-42889?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-42889 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.