CVE-2021-34111

Name: CVE-2021-34111
Creator: NVD / NIST
Published: 2022-05-20T03:15:07.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.55%

Last modified Jun 17, 2026

CVE-2021-34111 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Thecus 4800Eco was discovered to contain a command injection vulnerability via the username parameter in /adm/setmain.php.. EPSS estimates a 2.55% chance of exploitation in the next 30 days.

Description

Thecus 4800Eco was discovered to contain a command injection vulnerability via the username parameter in /adm/setmain.php.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.55%

83.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Thecus	N4800eco Firmware	All versions

References

https://docs.unsafe-inline.com/0day/thecus-n4800eco-nas-server-control-panel-comand-injectionExploit, Third Party Advisory
https://docs.unsafe-inline.com/0day/thecus-n4800eco-nas-server-control-panel-comand-injectionExploit, Third Party Advisory

Timeline

Published: May 20, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34111?

Thecus 4800Eco was discovered to contain a command injection vulnerability via the username parameter in /adm/setmain.php.

How severe is CVE-2021-34111?

CVE-2021-34111 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34111?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34111?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST