What is CVE-2021-42890?

CVE-2021-42890 is a critical-severity vulnerability in Totolink Ex1200t, classified under OS Command Injection. CVSS score: 9.8/10. Published 2022-06-03.

How severe is CVE-2021-42890?

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

Is CVE-2021-42890 known to be exploited?

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

RCE in Totolink Ex1200t

CVE-2021-42890

TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability in function NTPSyncWithHost of the file system.so which can control hostTime to attack.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.019 (76.8th percentile) — read the EPSS interpretation.

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.

Affected products

Totolink Ex1200t
Totolink Ex1200t_firmware — versions 4.1.2cu.5215
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-42890?: CVE-2021-42890 is a critical-severity vulnerability in Totolink Ex1200t, classified under OS Command Injection. CVSS score: 9.8/10. Published 2022-06-03.
How severe is CVE-2021-42890?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-42890 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.