CVE-2021-34565Network attack vector

Unauthenticated device access via hard-coded service credentials

Published Aug 31, 2021 · Updated Sep 17, 2024

Hard-coded credentials in Pepperl+Fuchs WirelessHART-Gateway 3.0.7 through 3.0.9 allow remote attackers to access SSH or Telnet services. The embedded services accept credentials compiled into the firmware instead of device-specific secrets. Network reachability to either service is the only reported gate; successful use permits command execution and can interrupt device service.

CVSS severity9.8
Critical
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

Hard-coded credentials in Pepperl+Fuchs WirelessHART-Gateway 3.0.7 through 3.0.9 allow remote attackers to access SSH or Telnet services. The embedded services accept credentials compiled into the firmware instead of device-specific secrets. Network reachability to either service is the only reported gate; successful use permits command execution and can interrupt device service.

The record

CVE
CVE-2021-34565
Published
Aug 31, 2021
Updated
Sep 17, 2024
Vendor
Pepperl+Fuchs
Product
WHA-GW-F2D2-0-AS-Z2-ETH.EIP
Classifications
CWE-798, T0886
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.0.7 <3.0.7*
  2. Affected versionversion=3.0.9 <=3.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pepperl+Fuchs · WHA-GW-F2D2-0-AS-Z2-ETH.EIPversion=3.0.7 <3.0.7*; version=3.0.9 <=3.0.9
Pepperl+Fuchs · WHA-GW-F2D2-0-AS-Z2-ETHversion=3.0.7 <3.0.7*; version=3.0.9 <=3.0.9

Published CVSS scores

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8CERT VDECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T0886Remote Services

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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