CVE-2021-34561

mediumpriority · track · 35EPSS 0.009 · 58 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.87% (58th) EPSS
CVSS 6.8 · medium
Is it mine?
14 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-22

In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 serious issue exists, if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

  • Mitigationpepperl_fuchs_psirt

    An external protective measure is required. - Minimize network exposure for affected products and ensure that they are not accessible via the Internet. - Isolate affected products from the corporate network. - If remote access is required, use secure methods such as virtual private networks (VPNs).

  • MitigationWHA-GW-F2D2-0-AS- Z2-ETHcisa_csaf_ot

    If remote access is required, use secure methods such as virtual private networks (VPNs).

  • MitigationWHA-GW-F2D2-0-AS- Z2-ETH.EIPcisa_csaf_ot

    If remote access is required, use secure methods such as virtual private networks (VPNs).

02

cvss

Technical severity, 0–10. One row per scoring source.

8.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9
v3.07.5highCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · CISA US
v3.17.5highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.17.5highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · info@cert.vde.comexploitability 1.6 · impact 5.9
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · Pepperl+Fuchs PSIRT DE
v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-350USCWE-350USCWE-350US
04

affected products (14)

Products and version ranges known to be affected.

05

advisories (2)

Vendor and ecosystem advisories describing this.

  • VDE-2021-027Pepperl+Fuchs: WirelessHART-Gateway - Vulnerability may allow remote attackers to cause a Denial Of Service2021-10-16csaf · pepperl_fuchs_psirtDE

    Critical vulnerabilities have been discovered in the product and in the utilized components jQuery by jQuery Team and TLS Version 1.0/1.1. The impact of the vulnerabilities on the affected device may result in - denial of service - remote code execution - code exposure

  • ICSA-22-097-01Pepperl+Fuchs WirelessHART-Gateway2022-04-07icsa · cisa_csaf_otUS

    Successful exploitation of these vulnerabilities may result in a denial-of-service condition, code execution, and code exposure.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otnvdpepperl_fuchs_psirtNVDCVE.orgMITRE
published 2021-08-31modified 2026-06-17
08

references (6)

External citations — patches, advisories, analysis.

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