Auth bypass in Terra-Master F2-210

CVE-2021-45841

In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the user's password hash. Guest users (disabled by default) can be abused using a null/empty hash and allow an unauthenticated attacker to login as guest.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.084 (94.8th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-45841: held from 0.083 to 0.084.

EPSS over last 30 days · oldest: 0.083 · newest: 0.084 · change: +0.001

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-45841?
CVE-2021-45841 is a high-severity vulnerability in Terra-Master F2-210, classified under Improper Authentication. CVSS score: 8.1/10. Published 2022-04-25.
How severe is CVE-2021-45841?
High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2021-45841 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.