CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and… (CVE-2026-3869)
CVE-2026-3869 is a vulnerability classified under CWE-303, indicating an incorrect implementation of an authentication algorithm. This flaw affects a programmable logic controller (PLC) when an application project with a lower application level runs on it. The vulnerability could lead to loss of confidentiality, integrity, and availability of the PLC. No specific affected software versions or patches are provided. There is no evidence of known exploits in the wild. The vulnerability is rated critical based on its potential impact.
AI Analysis
Technical Summary
This vulnerability involves an incorrect implementation of an authentication algorithm (CWE-303) in a PLC environment. When an application project with a lower application level is executed on the PLC, it may cause a loss of confidentiality, integrity, and availability of the device. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No patch or remediation details are provided, and no known exploits have been reported.
Potential Impact
The vulnerability can lead to a critical loss of confidentiality, integrity, and availability of the affected PLC. This means unauthorized parties could potentially compromise sensitive data, alter system behavior, or disrupt operations of the PLC. The impact is significant given the critical nature of PLCs in industrial control environments.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor vendor communications for updates. Until a fix is available, avoid running application projects with lower application levels on the affected PLCs if possible.
CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and… (CVE-2026-3869)
Description
CVE-2026-3869 is a vulnerability classified under CWE-303, indicating an incorrect implementation of an authentication algorithm. This flaw affects a programmable logic controller (PLC) when an application project with a lower application level runs on it. The vulnerability could lead to loss of confidentiality, integrity, and availability of the PLC. No specific affected software versions or patches are provided. There is no evidence of known exploits in the wild. The vulnerability is rated critical based on its potential impact.
CVSS v4.0
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an incorrect implementation of an authentication algorithm (CWE-303) in a PLC environment. When an application project with a lower application level is executed on the PLC, it may cause a loss of confidentiality, integrity, and availability of the device. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No patch or remediation details are provided, and no known exploits have been reported.
Potential Impact
The vulnerability can lead to a critical loss of confidentiality, integrity, and availability of the affected PLC. This means unauthorized parties could potentially compromise sensitive data, alter system behavior, or disrupt operations of the PLC. The impact is significant given the critical nature of PLCs in industrial control environments.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor vendor communications for updates. Until a fix is available, avoid running application projects with lower application levels on the affected PLCs if possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-g6jw-g6wr-2qcc
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-3869"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa47ebd55bf5e2cf58579cc
Added to database: 09/11/2026, 22:20:45 UTC
Last enriched: 09/11/2026, 22:31:35 UTC
Last updated: 09/11/2026, 23:01:23 UTC
Views: 4
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