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Fencer Vulns
critical 9.1

CVE-2026-44092 json

Missing input validation / stripping of CRLF characters in SystemConfigManager

published 2026-07-30 3 mo ago modified 2026-07-30 3 mo ago also EUVD-2026-51027

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

An unauthenticated remote attacker can inject malicious input into the ModbusServer application because it does not validate the input it fetches from MQTT. This may lead to integrity and availability loss.

Patch / fix

  • Phoenix Contact CHARX SEC-3150 1.9.1
  • Phoenix Contact CHARX SEC-3100 1.9.1
  • Phoenix Contact CHARX SEC-3050 1.9.1
  • Phoenix Contact CHARX SEC-3000 1.9.1

Vendor advisories

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

red hat product security vex CVE-2026-44092 updated cvss 9.1

ModbusServer: ModbusServer: Integrity and availability loss via malicious MQTT input injection

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Phoenix Contact CHARX SEC-3150
  • Phoenix Contact CHARX SEC-3100
  • Phoenix Contact CHARX SEC-3050
  • Phoenix Contact CHARX SEC-3000

Classification

Weakness
  • CWE-93 Improper Neutralization of CRLF Sequences

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.