CHARX SEC-3150: Improper Verification of Cryptographic Signature
CVE-2026-44104 is a critical-severity improper verification of cryptographic signature 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 0.41% chance of exploitation within 30 days, which is low compared with other 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
- 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 system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 9.3 | Critical | CNA (cert.vde.com) |
| CVSS 3.1 | 9.8 | Critical | CNA (cert.vde.com) |
Official description
The firmware update process for the basemodule of the charging controller only validates the CRC32 checksum without cryptographic signature verification. This allows an unauthenticated remote attacker to install a modified firmware, resulting in full system compromise.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
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
- 9.4 Critical severity
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 9.8 Critical severity
- 7.8 High severity
- 7.5 High severity
- 8.6 High severity
- 7.5 High severity
- 8.2 High severity
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