Risk Record — Closure: Network Segmentation Ruleset Drift (CCN-RISK-2025-014)
| Document | Risk Record (Closure) |
| Risk ID | CCN-RISK-2025-014 |
| Register | CloudCore Enterprise Risk Register (DOC-RISK-001) |
| Version | 2.0 (Closed) |
| Risk owner | Networks Specialist — Carlos Mendes |
| Risk raised | 14-07-2025 |
| Risk closed | 28-08-2025 |
| Closure status | Accepted — No Further Action |
1. Risk Description
As originally raised (14-07-2025):
Potential drift between the documented network architecture and the live rule set on the Malaga primary data-centre internal firewall (CCN-FW-CORE-01), specifically the segmentation rule governing traffic between the administrative VPN segment and the customer-data zone (hosting DB-Server-01). Stale or overly-permissive rules in this zone could permit lateral movement from a compromised administrative account to the customer database.
| Field | Value at raising |
|---|---|
| Inherent likelihood | Medium |
| Inherent impact | High |
| Inherent rating | High |
| Existing controls | Perimeter firewall; admin VPN; MFA on admin accounts |
2. Assessment and Treatment
The risk was reviewed by the Networks team in conjunction with the CISO. The following treatment was determined:
| Field | Value |
|---|---|
| Treatment option | Accept |
| Rationale | Rule set reviewed against the 2025 architecture diagram; reviewed sample judged current and consistent with operational requirements. No changes required at this time. |
| Residual likelihood | Low |
| Residual impact | High |
| Residual rating | Medium → Accepted |
Reviewer comment (28-08-2025): “Core rule set reviewed during the July change window. Rules align with current segmentation model. Treating as accepted; will re-examine at the next semi-annual review.” — C. Mendes, Networks Specialist.
3. Closure
| Field | Detail |
|---|---|
| Date closed | 28-08-2025 |
| Closed by | Carlos Mendes (Networks Specialist) |
| Approved by | Sophia Martines (CISO) |
| Closure disposition | Accepted — No Further Action |
| Next review | Semi-annual firewall review (scheduled 02-2026) |
| Linked change requests | None |
4. Sign-off
The risk is recorded as CLOSED in the Enterprise Risk Register as of 28-08-2025. No compensating or corrective actions remain open against this record.
Record extracted from the CloudCore Enterprise Risk Register (DOC-RISK-001). Closure approved 28-08-2025.