CVE-2021-30127Public exploitNetwork attack vector

Administrative interface exposure via automatic UPnP forwarding

Published Apr 3, 2021 · Updated Aug 3, 2024

Improper access control in TerraMaster F2-210 devices through 2021-04-03 allows remote attackers to reach the admin web server. The device's UPnP configuration requests that a compatible router forward TCP port 8181 to the TOS management interface despite labeling it local-only. Exposure requires UPnP on the gateway; administrative actions still require TOS credentials, but the login service becomes Internet-reachable.

CVSS severity7.3
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in TerraMaster F2-210 devices through 2021-04-03 allows remote attackers to reach the admin web server. The device's UPnP configuration requests that a compatible router forward TCP port 8181 to the TOS management interface despite labeling it local-only. Exposure requires UPnP on the gateway; administrative actions still require TOS credentials, but the login service becomes Internet-reachable.

The record

CVE
CVE-2021-30127
Published
Apr 3, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

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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