Vulnerability Intelligence Report
CVE-2021-33485
CODESYS Control Runtime system before 3.5.17.10 has a Heap-based Buffer Overflow.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:1.14%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-122 ↗CWE-122 Heap-based Buffer Overflow
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| codesys | control | all |
| codesys | control_rte | all |
| codesys | control_runtime_system_toolkit | all |
| codesys | control_win_sl | all |
| codesys | embedded_target_visu_toolkit | all |
| codesys | hmi | all |
| codesys | remote_target_visu_toolkit | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
1.144%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | MITRE Corporation · N/A · USA |
| Reserved | 2021-05-21T00:00:00 |
| Published | 2021-08-03T15:44:56 |
| Last Updated | 2026-05-29T14:02:56 |
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