CVE-2021-34561 - CVE House
Back to Database
Status published High CVE-2021-34561

A vulnerability in WirelessHART-Gateway <= 3.0.8 allows to bypass any IP or firewall based access restrictions through DNS rebinding

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-34561

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Pepperl+Fuchs reported this vulnerability. CERT@VDE coordinated.

References

More from Phoenix Contact

View All →
CVE-2025-41752
Reflected XSS vulnerability in pxc_portSfp.php
High 7.1
CVE-2025-41751
Reflected XSS vulnerability in pxc_portCntr.php
High 7.1
CVE-2025-41750
Reflected XSS vulnerability in pxc_PortCfg.php
High 7.1
CVE-2025-41749
Reflected XSS vulnerability in port_util.php
High 7.1
CVE-2025-41748
Reflected XSS vulnerability in pxc_Dot1xCfg.php
High 7.1

Affected Vendor

Phoenix Contact

View all reports →

Affected Software

WHA-GW-F2D2-0-AS- Z2-ETH, WHA-GW-F2D2-0-AS- Z2-ETH.EIP
Vulnerable Versions:
3.0.8

Timeline

Official Publish: August 31st, 2021
Last Modified: September 17th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-350

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.