CVE-2023-39620Public exploitNetwork attack vector

Unauthenticated metadata disclosure via disabled guest account

Published Sep 8, 2023 · Updated Sep 26, 2024

Information disclosure in BUFFALO INC. TeraStation TS5410R firmware 5.00-0.07 allows remote attackers to enumerate NAS metadata over SMB and RPC. The appliance accepts SMB and RPC authentication for the built-in guest account after that account is disabled in the management interface. Network access to SMB or RPC is sufficient to list users, groups, shares, filesystem paths, and share access-control details; file contents are not shown as exposed.

CVSS severity7.5
High
EPSS probability0.94%
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 BUFFALO INC. TeraStation TS5410R firmware 5.00-0.07 allows remote attackers to enumerate NAS metadata over SMB and RPC. The appliance accepts SMB and RPC authentication for the built-in guest account after that account is disabled in the management interface. Network access to SMB or RPC is sufficient to list users, groups, shares, filesystem paths, and share access-control details; file contents are not shown as exposed.

The record

CVE
CVE-2023-39620
Published
Sep 8, 2023
Updated
Sep 26, 2024
Vendor
BUFFALO INC.
Product
TeraStation TS5410R
Classifications
CWE-200, T1087.001, T1078.001, T1069.001, T1135
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v.5.00 <=v.0.07

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BUFFALO INC. · TeraStation TS5410Rversion=v.5.00 <=v.0.07

Published CVSS scores

7.5NVDCVSS: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

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1087.001Account Discovery: Local Account
T1078.001Valid Accounts: Default Accounts
T1069.001Permission Groups Discovery: Local Groups
T1135Network Share Discovery

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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