Penetration testing for Indonesian telecommunications operators

A telecom operator cannot wait for an incident to find out whether its subscriber database or its signalling layer is exploitable. The systems that hold customer identity and carry authentication traffic are exactly what an attacker probes first, and Kominfo now expects operators to run annual security assessments and keep a tested incident response plan. Testing those systems before an attacker does is how an operator turns that expectation into evidence. This page covers what has to be in scope for a telecom operator specifically, why the work looks different from an enterprise test, and how we deliver it. For how a penetration test works in general, see our penetration testing service page.

Why testing looks different for a telecom operator

A telecom network is not a bigger enterprise network. It has layers that only an operator runs, and each of them carries its own risk that a generic test would never reach.

The breach pattern behind most of these is consistent and worth naming. Subscriber data is exposed through unpatched internet-facing systems, excess data retention that keeps records long after they are needed, and weak access controls on the customer databases. A penetration test is built to find those three before an attacker does, because each of them is a known way a subscriber-database breach starts rather than a hypothetical.

What we test and how we deliver it

A telecom operator's attack surface is wider than a single web app, so scoping has to account for every layer that reaches subscriber data or carries authentication traffic.

Every engagement includes a free retest once fixes are in, because a report that says "fixed" only means something if someone checks. The part that matters most for a telecom operator is the segmentation between corporate IT and the signalling core: the real question is whether a compromised office system can reach the network that carries subscriber traffic, and that boundary is tested rather than assumed. If you are weighing a lighter-touch vulnerability scan against a full test, our page on vulnerability assessment vs penetration testing sets out where each one fits, and our page on how long penetration testing takes explains why a telecom scope runs longer than an enterprise one.

What the numbers say about the sector

More than 350 million mobile connections means a subscriber database is one of the largest concentrations of personal data in the country, so an untested access control on it is a national-scale risk rather than a local one. With 5G coverage still around 15 percent of the population in late 2023, most operators are testing a hybrid network where a growing cloud-native 5G core sits alongside legacy signalling, and both need to be in scope. The short UU PDP notification clock is why finding the exploitable gap first, through testing, is cheaper than finding it through a breach.

If your annual security assessment is coming up and you want the test scoped to your subscriber, signalling, and 5G systems rather than a generic checklist, our team can set out a concrete next step.