Codesys Gateway Server
CVE-2012-4704
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Impact | CVSS score of 10.0 (CRITICAL). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 12.08%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system. |
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Alert meAnalysisAI
Array index error in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via a crafted packet. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. Epss exploitation probability 12.1% and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-20. Array index error in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via a crafted packet. Affected products include: 3S-Software Codesys Gateway-Server. Version information: before 2.3.9.27.
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Severity by source
AV:N/AC:L/Au:N/C:C/I:C/A:C
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
Array index error in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via a crafted packet.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
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3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via vectors that trigger an
Use-after-free vulnerability in the server application in 3S CODESYS Gateway 2.3.9.27 allows remote attackers to cause a
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Integer signedness error in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to cause a denial of servi
3S-Smart CODESYS Gateway Server before 2.3.9.48 allows remote attackers to cause a denial of service (NULL pointer deref
GitHub PoC
Exploit-DB