CVE-2021-45842Public exploitNetwork attack vector

Administrator hash disclosure via unauthenticated NAS API

Published Apr 25, 2022 · Updated Aug 4, 2024

Information disclosure in TerraMaster TOS 4.2.X on F4-210 and F2-210 NAS devices allows remote attackers to read an administrator password hash. The unauthenticated mobile/wapNasIPS handler in module/api.php returns the PWD field, MAC address, internal IP address, and firmware metadata to requests bearing TNAS device headers. Network reachability is sufficient; the disclosed hash and MAC-derived token material supports administrator-session forgery and subsequent device compromise.

CVSS severity7.5
High
EPSS probability2.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in TerraMaster TOS 4.2.X on F4-210 and F2-210 NAS devices allows remote attackers to read an administrator password hash. The unauthenticated mobile/wapNasIPS handler in module/api.php returns the PWD field, MAC address, internal IP address, and firmware metadata to requests bearing TNAS device headers. Network reachability is sufficient; the disclosed hash and MAC-derived token material supports administrator-session forgery and subsequent device compromise.

The record

CVE
CVE-2021-45842
Published
Apr 25, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1003OS Credential Dumping

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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