What’s Vulnerable › Vulnerabilities

CVE-2021-45840

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-25 · updated 2026-06-17

Description

It is possible to execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by sending specifically crafted input to /tos/index.php?app/app_start_stop.

Affected products

• Terra-Master Tos: 4.2.15-2107141517

References

• https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/
• https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/

Get alerted when CVE-2021-45840 or the next vulnerability affects your stack