CVE-2021-34683Network attack vector

Unauthenticated directory disclosure via unprotected endpoint

Published Jun 16, 2021 · Updated Aug 4, 2024

Information disclosure in EIC E-document System 3.0 allows remote attackers to obtain organization-wide names and email addresses. The kw/auth/bbs/asp/get_user_email_info_bbs.asp endpoint returns the complete contact directory without enforcing authentication. No account or user interaction is required, and the exposed data supports social engineering and password guessing against the login page.

CVSS severity5.3
Medium
EPSS probability1.08%
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 EIC E-document System 3.0 allows remote attackers to obtain organization-wide names and email addresses. The kw/auth/bbs/asp/get_user_email_info_bbs.asp endpoint returns the complete contact directory without enforcing authentication. No account or user interaction is required, and the exposed data supports social engineering and password guessing against the login page.

The record

CVE
CVE-2021-34683
Published
Jun 16, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2021CVE 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
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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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