CHARX SEC-3150: Improper Neutralization of CRLF Sequences
CVE-2026-44092 is a critical-severity improper neutralization of CRLF sequences vulnerability in CHARX SEC-3150 from Phoenix Contact, with a CVSS 3.1 base score of 9.1 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 0.68% chance of exploitation within 30 days, higher than 53% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update CHARX SEC-3150 to 1.9.1 or a later version.
- Update CHARX SEC-3100 to 1.9.1 or a later version.
- Update CHARX SEC-3050 to 1.9.1 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Phoenix Contact | CHARX SEC-3150 | 1.0.0 up to, but not including, 1.9.1 | 1.9.1 |
| Phoenix Contact | CHARX SEC-3100 | 1.0.0 up to, but not including, 1.9.1 | 1.9.1 |
| Phoenix Contact | CHARX SEC-3050 | 1.0.0 up to, but not including, 1.9.1 | 1.9.1 |
| Phoenix Contact | CHARX SEC-3000 | 1.0.0 up to, but not including, 1.9.1 | 1.9.1 |
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
- NoneNo data is disclosed.
- 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:N/I:H/A:H. Scored by CNA (cert.vde.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.8 | High | CNA (cert.vde.com) |
| CVSS 3.1 | 9.1 | Critical | CNA (cert.vde.com) |
Official description
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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of CRLF Sequences
The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
How developers prevent this class of flaw
- Appropriately filter or quote CRLF sequences in user-controlled input.
More Improper Neutralization of CRLF Sequences vulnerabilities (CWE-93)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
References
Other references
Other vulnerabilities in CHARX SEC-3150
- 9.8 Critical severity
- 9.8 Critical severity
- 7.5 High severity
- 7.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Improper Neutralization of CRLF Sequences vulnerabilities
- 7.2 High severity
- 7.6 High severity
- 8.8 High severity
- 8.5 High severity
- 7.5 High severity
- 7.5 High severity
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