CVE-2021-42540Network attack vector

Configuration overwrite via unsanitized extraction path

Published Oct 22, 2021 · Updated Sep 16, 2024

Path traversal in Emerson WirelessHART Gateway 1410, 1410D, and 1420 through 4.7.94 allows remote authenticated users to overwrite files. The system-configuration extraction logic accepts an unsanitized destination folder, allowing extracted content to replace settings and other key files. A low-privileged account and user interaction are required; exploitation can alter gateway configuration and disrupt key functions.

CVSS severity8.0
High
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Emerson WirelessHART Gateway 1410, 1410D, and 1420 through 4.7.94 allows remote authenticated users to overwrite files. The system-configuration extraction logic accepts an unsanitized destination folder, allowing extracted content to replace settings and other key files. A low-privileged account and user interaction are required; exploitation can alter gateway configuration and disrupt key functions.

The record

CVE
CVE-2021-42540
Published
Oct 22, 2021
Updated
Sep 16, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-123, T0836
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.0ICS-CERTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-123Write-what-where Condition
T0836Modify Parameter

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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