CyberSecBulletin
CVE-2026-7849NVD status: Deferred

CHARX SEC-3150: Improper Neutralization of Special Elements used in a Command

Published Updated By the CyberSecBulletin desk

CVE-2026-7849 is a critical-severity improper neutralization of special elements used in a command vulnerability in CHARX SEC-3150 from Phoenix Contact, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 1.9.1 as the first without the flaw, so updating CHARX SEC-3150 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.75% chance of exploitation within 30 days, higher than 56% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update CHARX SEC-3150 to 1.9.1 or a later version.
  2. Update CHARX SEC-3100 to 1.9.1 or a later version.
  3. Update CHARX SEC-3050 to 1.9.1 or a later version.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Phoenix ContactCHARX SEC-31501.0.0 up to, but not including, 1.9.11.9.1
Phoenix ContactCHARX SEC-31001.0.0 up to, but not including, 1.9.11.9.1
Phoenix ContactCHARX SEC-30501.0.0 up to, but not including, 1.9.11.9.1
Phoenix ContactCHARX SEC-30001.0.0 up to, but not including, 1.9.11.9.1

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (cert.vde.com).

Scoring systemScoreSeverityScored by
CVSS 4.09.3CriticalCNA (cert.vde.com)
CVSS 3.19.8CriticalCNA (cert.vde.com)

Official description

Due to improper neutralization of special elements, an unauthenticated remote attacker is able to inject a command into the system configuration which is subsequently executed as root.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Neutralization of Special Elements used in a Command

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

How developers prevent this class of flaw

  • If at all possible, use library calls rather than external processes to recreate the desired functionality.
  • If possible, ensure that all external commands called from the program are statically created.
  • Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).

References

Other vulnerabilities in CHARX SEC-3150

All CHARX SEC-3150 vulnerabilities

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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