IEC 62443 security levels by attacker capability; destructive primitives are SL3-SL4
SL1-SL4observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| As of | 2025 |
| Source | ISA/IEC 62443 · Section “Security level”: definitions of SL1 through SL4 by attacker means, resources, skills, and motivation |
| Review | checking…review by 2027-02-02 · slow cadence |
| Recorded changes | last 2026-06-29 |
| Claim id | iec-62443-security-levels-by-attacker |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.