RISK-0014 Supplier Service Change Without Risk Review

RISK-0014

Risk summary

Likelihood

4

Impact

4

Score

16

Level

High

1. 01

   Asset

   Supplier services, supplier controls, service reports, supplier access, supplier change records, assurance reports, incident notifications, and contract variations.

   Business object or system that needs protection.
2. 02

   Threat

   Uncontrolled supplier service change, degraded supplier security practice, repeated supplier finding, missed supplier incident, unreviewed support change, or silently changed data processing location.

   Event, actor, or condition that can create harm.
3. 03

   Vulnerability

   Supplier monitoring is one-time, reports are stored but not evaluated, material changes are accepted by operations without security review, and corrective actions are not tracked.

   Weakness that makes the threat relevant.
4. 04

   Risk

   Because supplier service reports, security practices, incidents, and material changes are not actively reviewed, supplier risk may increase after onboarding without triggering control updates or management decisions.

   Scenario evaluated with likelihood, impact, and ownership.
5. 05

   Treatment

   Mitigate through assigned supplier owners, scheduled reviews, service and security report review, change logs, risk reassessment, incident integration, corrective action tracking, and contract update review.

   Decision path for reducing, accepting, transferring, or avoiding risk.

Controls that treat the risk

• ISO27001-A.5.22 Monitoring, Review and Change Management of Supplier Services
• A.5.22 Monitoring, Review and Change Management of Supplier Services

Evidence that proves operation

• Supplier Service Review and Change Log
• Corrective Action Tracker
• A.5.22 Audit Evidence Pack

Assessment Rationale

Likelihood

The likelihood is high because suppliers change platforms, staff, subcontractors, service scope, locations, and controls over time while the original onboarding evidence becomes stale.

Impact

The impact is high because unreviewed supplier changes can bypass agreed controls, break contract assumptions, increase regulatory exposure, and delay incident or corrective action.

Residual Risk

After treatment, residual risk is estimated as medium when high-risk suppliers have review records, material changes trigger reassessment, and findings produce tracked corrective actions.

Review Notes

Review after supplier reports, SLA misses, security incidents, assurance findings, service scope changes, location changes, support model changes, and contract variations.

Software Object Mapping

• risk
• supplier
• review
• change
• control
• evidence