THREATPORT/VULNERABILITY/CVE-2021-45841
HIGH SEVERITY

CVE-2021-45841

Tos vulnerability

CVSS
8.1
EPSS
8.3%
EPSS pct
94th
Exploited
No known
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.
Affected vendor
Terra Master
Affected product
Tos
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-287 — Improper Authentication
  • CWE-798 — Use of Hard-coded Credentials
Published
2022-04-25

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 8.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2021-45841

  • Confirm whether Terra Master Tos is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-45841.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-45841

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-45841 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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