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Fencer Vulns
medium 5.4

CVE-2021-34559 json

A vulnerability in WirelessHART-Gateway <= 3.0.8 may allow remote attackers to rewrite links and URLs in cached pages to arbitrary strings

published 2021-08-31 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21209

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-097-01 updated cvss 5.4

Pepperl+Fuchs WirelessHART-Gateway

  • Pepperl+Fuchs WHA-GW-F2D2-0-AS- Z2-ETH 3.0.7, 3.0.8, 3.0.9 Pepperl+Fuchs WHA-GW-F2D2-0-AS- Z2-ETH.EIP 3.0.7, 3.0.8, 3.0.9
    affected: mitigation “Minimize network exposure for affected products and ensure they are not accessible via the Internet.” cert.vde.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • Phoenix Contact WHA-GW-F2D2-0-AS- Z2-ETH
  • Phoenix Contact WHA-GW-F2D2-0-AS- Z2-ETH.EIP

Classification

Weakness
  • CWE-444 Inconsistent Interpretation of HTTP Requests

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.