CVE-2021-45836

Name: CVE-2021-45836
Creator: NVD / NIST
Published: 2022-04-25T11:15:07.047+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.38%

Last modified Jun 17, 2026

CVE-2021-45836 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An authenticated attacker can execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by injecting a maliciously crafted input in the request through /tos/index.php?app/hand_app.. EPSS estimates a 2.38% chance of exploitation in the next 30 days.

Description

An authenticated attacker can execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by injecting a maliciously crafted input in the request through /tos/index.php?app/hand_app.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.38%

81.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Terra-Master	Tos	4.2.15-2107141517

References

https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/Exploit, Third Party Advisory
https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/Exploit, Third Party Advisory

Timeline

Published: Apr 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45836?

How severe is CVE-2021-45836?

CVE-2021-45836 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.38% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45836?

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-2021-45836?

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

Scan your code now

Source: NVD / NIST