See and reduce third-party attack paths before they become incidents
Your strongest controls may still trust the partner an attacker compromises. Modern financial services run on vendors, APIs, SaaS platforms and software dependencies that institutions do not fully control. Attackers exploit these trusted relationships to reach hardened environments indirectly. Drawing on real forensic investigations, SISA helps expose and close those paths before a third party’s weakness becomes your incident.
Inside a real supply-chain breach: the forensic breakdown from the Digital Threat Report 2025
THE STAKES
The boundary between what's "inside" your institution and what isn't has dissolved. Open banking APIs, embedded ecosystems, cloud and SaaS integrations, and software dependencies have turned your perimeter into something defined by other people's configurations and vendor due-diligence only proves a partner's posture at the moment of assessment, not whether the integration holds when identity, code, cloud, and API layers are abused between reviews.
Attackers bypass well-defended banks by compromising the providers that serve them all — a single shared-vendor breach surfaces across multiple institutions at once.
Compromised updates, malicious packages, and CI/CD tampering let attackers enter through software and services you've already approved.
Risk travels through your vendors' vendors — transitive dependencies in cloud, identity, and SaaS that you carry but rarely see.
OAuth scopes, machine identities, and SaaS-to-SaaS connections quietly expand beyond their vetted intent, turning a single foothold into estate-wide access.
THIRD-PARTY BREACHES ARE ATTACK CHAINS, NOT ISOLATED VENDOR FAILURES
A supply-chain incident rarely begins and ends with one provider.
It develops as weaknesses align across governance, software, identity, cloud, API, runtime, and data layers. A vendor may pass its assessment while an overprivileged service account, exposed API, poisoned dependency, or unmonitored integration still creates a direct path into your environment.
Built on insights from real forensic investigations, SISA helps institutions identify and reduce these connected attack paths across the full third-party relationship.
How SISA closes the suppy-chain gap
SISA addresses each layer where third-party trust turns into exposure built on what our forensic investigations show actually happens.
Govern the risk you inherit
Move beyond static questionnaires with a structured view of third-party exposure, control maturity, remediation status, and accountability.
SISA’s information security risk assessment and managed compliance services help institutions classify vendors, evaluate control effectiveness, track findings, and establish evidence-based governance across the third-party lifecycle.
Verify what enters your environment
Assess the integrity of software, AI models, dependencies, and digital artefacts before trusted delivery mechanisms become attack vectors.
SISA helps identify manipulated components, poisoned artefacts, and supply-chain integrity risks that conventional vendor due diligence does not inspect.
Validate that controls continue to hold
Third-party controls can drift long before the next formal review.
SISA continuously collects evidence, validates integration-related controls, and surfaces overdue remediation, assurance gaps, and control failures between assessment cycles.
Test integrations the way an attacker would
A compliant integration can still be exploitable.
SISA tests APIs, applications, authorization models, inter-service trust, and assumed-breach scenarios to uncover the chained weaknesses that allow a compromised partner to move into core systems.
Testing covers risks such as: broken authorization; IDOR; API misuse; privilege escalation; insecure service-to-service communication; integration and business-logic abuse.
Detect compromise through live behaviour
A third-party breach may first appear as unusual activity inside your own environment.
SISA monitors identity, endpoint, cloud, network, and service-to-service behaviour to detect anomalous access, lateral movement, and runtime activity associated with a compromised partner or integration.
Understand the potential data impact
Not every integration exposes the same level of risk.
SISA discovers and classifies sensitive payment, customer, and business data, helping teams understand the potential blast radius of compromised third-party access and prioritize the paths that matter most.
One view of third-party exposure
Supply-chain risk develops in the gaps between governance, testing, monitoring, identity, data, and response.
Through OneLens™, SISA One unifies these capabilities into a single, board-ready picture of third-party exposure, surfacing the transitive, inter-service, and pipeline risk that slips between siloed tools and periodic reviews.
Start with the product that fits today. Expand as your third-party estate does.
The Third-Party Attack-Path Review
A focused engagement with SISA's forensic and offensive security experts. You get:
A mapped view of the access paths a compromised vendor, integration, or dependency would inherit into your environment
A prioritized exposure report benchmarked against attack chains from real BFSI investigations
A 1:1 debrief session with a SISA forensic expert
Related Use Cases
Ransomware Prevention
Insider Threat & Privileged Access
Central Bank Compliance
AI Security
Find out what an attacker could reach through your supply chain before your next vendor review does.
FAQs
Third-party cyber risk is the exposure created when vendors, service providers, software suppliers, cloud platforms, or partners have access to an organization’s systems, data, applications, or operational processes.
Traditional third-party risk management focuses largely on governance, assessments, documentation, and compliance. Supply-chain security also examines the technical paths created by software, identities, APIs, cloud integrations, dependencies, and runtime behaviour.
An attack chain is a sequence of individually small gaps — a vendor foothold, a drifted OAuth scope, a flat integration trust path — that align to give an attacker estate-wide access. SISA's forensic investigations show most supply-chain breaches follow this pattern rather than a single catastrophic vendor failure.
Annual assessments provide a point-in-time view. They may not detect access drift, new integrations, expired evidence, unresolved remediation, software compromise, or suspicious activity that emerges between review cycles.
Fourth-party risks arise from the suppliers, platforms, and dependencies used by your direct vendors. These relationships can create indirect access or operational dependencies that your institution does not directly govern.
SISA combines risk assessment, control validation, API and application testing, assumed-breach exercises, identity and runtime monitoring, supply-chain integrity checks, and sensitive-data discovery to identify connected paths into the environment.
SISA's ProACT Agentic SOC monitors live system and integration flows for the lateral movement and anomalous service-to-service behavior that follow a third-party breach, surfacing the compromise as a signal in your environment rather than weeks-later news.
Yes. SISA’s capabilities are designed to complement existing security, compliance, identity, cloud, and risk investments rather than requiring institutions to replace their current technology stack.
SISA’s forensic investigation and incident response teams can help determine the scope of access, identify affected systems and data, contain the incident, preserve evidence, and support recovery.
Yes. SISA's compliance and managed-compliance services map third-party controls to central bank and payment-industry requirements, producing evidence regulators and auditors accept — an area covered in depth on our Central Bank Compliance page.