CVE-2021-45421Network attack vector

Unauthenticated file disclosure via exposed directory listings

Published Feb 14, 2022 · Updated Jul 9, 2026

Information disclosure in Emerson Dixell XWEB-500 allows remote attackers to read files through unauthenticated directory listings. The embedded web server returns directory indexes and serves files from remotely reachable directories without authentication. No affected version boundary is published; the documented consequence is file disclosure, with no reported write or service-interruption capability.

CVSS severity7.5
High
EPSS probability1.27%
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 Emerson Dixell XWEB-500 allows remote attackers to read files through unauthenticated directory listings. The embedded web server returns directory indexes and serves files from remotely reachable directories without authentication. No affected version boundary is published; the documented consequence is file disclosure, with no reported write or service-interruption capability.

The record

CVE
CVE-2021-45421
Published
Feb 14, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1083
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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 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

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1083File and Directory Discovery

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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