The risk register is the central document of CTDISR-2025 Section 4 compliance. It records the risks the organisation has identified, how they have been assessed, and what is being done about them. An auditor reviewing Section 4 will ask to see the risk register, assess whether the risks it contains reflect the organisation's actual threat landscape, and verify that treatment actions are being tracked and implemented.
The most common problem with risk registers produced for CTDISR compliance is that they look like compliance artefacts rather than management tools: generic risks copied from a template with no connection to the specific infrastructure, business model, or threat environment of the operator producing them. An auditor experienced with Pakistani ISPs can identify this disconnect quickly.
The Risk Identification Process
Start from your actual environment, not from a generic framework. The threats relevant to a Pakistani WISP are not identical to those relevant to a national fibre operator, and neither is identical to the threats in a generic IT risk framework. Before writing a single row in the register, answer these questions: what are the most valuable things we have that an attacker would want (subscriber data, network access, financial systems), what would cause the most subscriber impact if it failed (authentication systems, core routing, CGNAT), what external threats are we most exposed to given our connectivity and geography, and what internal vulnerabilities do we already know about?
The risk identification output is a list of risk scenarios, each combining a threat (what could happen) with a vulnerability (why it could happen to us) and a potential consequence. A risk scenario for a Pakistani ISP might be: "Ransomware infection of billing server via phishing email to finance staff, resulting in subscriber data loss and billing system downtime affecting revenue collection."
The Rating Scale
Use a consistent rating scale for likelihood and impact. A 5x5 matrix (likelihood 1-5, impact 1-5, risk score = likelihood x impact) is the most common and produces a 1-25 scale that is easy to interpret. Define the scale explicitly: likelihood 5 means the event is expected to occur in the next 12 months, likelihood 1 means the event is theoretically possible but has not occurred in the sector in living memory. Impact 5 means full service loss affecting all subscribers for more than 24 hours or regulatory enforcement action, impact 1 means a brief disruption affecting fewer than 10 subscribers with no lasting consequence.
Apply the scale consistently across all risks. A common error is rating likelihood too high for all risks (making everything appear critical) or rating impact too low for financial and regulatory risks (minimising risks the assessor does not fully understand). A risk register where every risk scores 20-25 indicates a calibration problem rather than an exceptionally high-risk environment.
Register Structure
Each risk entry should contain: a risk ID for reference, risk description (the scenario), risk category (operational, security, regulatory, financial), threat and vulnerability, likelihood rating, impact rating, risk score, risk owner (the named individual responsible for treatment), current controls that partially address the risk, treatment approach (accept, mitigate, transfer, avoid), treatment actions with due dates, residual risk score after treatment, and status (open, in treatment, closed).
The risk owner field is operationally important: a risk without a named owner has no accountability for treatment. The CISO owns the risk register process, but individual risks are owned by whoever is responsible for the systems or processes they relate to. A risk relating to CGNAT logging is owned by the network operations lead, not the CISO.
Pakistani ISP-Specific Risks to Include
Beyond generic IT risks, a Pakistani ISP risk register should explicitly address: regulatory non-compliance finding leading to enforcement action (high likelihood given expanding CTDISR audit scope, high impact due to regulatory consequences), BGP hijacking affecting subscriber routing (medium likelihood given routing security maturity in the region, high impact), upstream provider outage causing complete connectivity loss (medium-high likelihood, critical impact for single-homed operators), DDoS attack exceeding mitigation capacity (high likelihood given Pakistani ISP threat environment, high impact), CNIC or subscriber data breach triggering lawful inquiry (low-medium likelihood, very high regulatory and reputational impact), and key staff departure creating operational single points of failure (medium-high likelihood for small teams, medium-high impact depending on coverage breadth).
Maintaining the Register
A risk register that is built for the annual audit and not touched until the next one fails the Section 4 requirement for maintained risk management. Review the register quarterly: update treatment status for open items, add new risks identified since the last review, and reassess existing risks where circumstances have changed. The quarterly review record is itself evidence of ongoing risk management rather than point-in-time compliance.
For operators where the CISO function maintains the risk register as part of ongoing governance, CISO-as-a-Service covers risk register ownership and maintenance. For a platform that manages the risk register alongside all other CTDISR compliance evidence, ComplianceIQ provides the structured tracking and reporting capability.