CVE-2021-34559

Name: CVE-2021-34559
Creator: NVD / NIST
Published: 2021-08-31T11:15:07.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.77%

Last modified Jun 17, 2026

CVE-2021-34559 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 a vulnerability may allow remote attackers to rewrite links and URLs in cached pages to arbitrary strings.. EPSS estimates a 0.77% chance of exploitation in the next 30 days.

Description

In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 a vulnerability may allow remote attackers to rewrite links and URLs in cached pages to arbitrary strings.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.77%

50.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Pepperl-Fuchs	Wha-Gw-F2d2-0-As-Z2-Eth Firmware	<= 3.0.8
Pepperl-Fuchs	Wha-Gw-F2d2-0-As-Z2-Eth.Eip Firmware	<= 3.0.8

References

https://cert.vde.com/en-us/advisories/vde-2021-027Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2021-027Third Party Advisory

Timeline

Published: Aug 31, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34559?

In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 a vulnerability may allow remote attackers to rewrite links and URLs in cached pages to arbitrary strings.

How severe is CVE-2021-34559?

CVE-2021-34559 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34559?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34559?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST