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Fencer Vulns
medium 5.3

CVE-2025-41706 json

Phoenix Contact: Webserver Denial of Service through Malformed Content-Length

published 2025-10-14 12 mo ago modified 2026-10-18 21 d ago also EUVD-2025-34148

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

The webserver is vulnerable to a denial of service condition. An unauthenticated remote attacker can craft a special GET request with an over-long content-length to trigger the issue without affecting the core functionality.

Patch / fix

  • Phoenix Contact QUINT4-UPS/24DC/24DC/5/EIP VC:07
  • Phoenix Contact QUINT4-UPS/24DC/24DC/10/EIP VC:07
  • Phoenix Contact QUINT4-UPS/24DC/24DC/20/EIP VC:07
  • Phoenix Contact QUINT4-UPS/24DC/24DC/40/EIP VC:07

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

1.67% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

  • Phoenix Contact QUINT4-UPS/24DC/24DC/5/EIP
  • Phoenix Contact QUINT4-UPS/24DC/24DC/10/EIP
  • Phoenix Contact QUINT4-UPS/24DC/24DC/20/EIP
  • Phoenix Contact QUINT4-UPS/24DC/24DC/40/EIP

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

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.