They should split ownership but align controls. Finance and sustainability teams define the disclosures, security governs access, logging, and integrity, and compliance verifies that evidence exists across the reporting period. That model prevents CSRD from becoming a late-stage documentation exercise and makes assurance part of normal operations.
Why This Matters for Security Teams
CSRD evidence is not just a reporting artifact. It becomes defensible only when the underlying records can be traced, protected, and reproduced across the reporting period. Security teams are often pulled in late to prove access control, logging, and integrity after disclosures are drafted, which creates avoidable gaps. The better model is to treat evidence handling as part of control operation, not a one-time request.
That matters because CSRD assurance can touch systems that also hold sensitive business, employee, supplier, and financial data. Security typically owns the mechanisms that make evidence trustworthy: access restrictions, immutable logging, retention, and tamper detection. Compliance owns the interpretation of what must be retained and how it is presented. NIST Cybersecurity Framework 2.0 is useful here because it frames governance, protection, detection, and recovery as an operating model rather than a document checklist. In practice, many organisations only discover weak evidence lineage when an audit request lands after the reporting period has already closed.
How It Works in Practice
A workable CSRD operating model starts with a shared evidence register. Finance and sustainability teams define the disclosure items, the data sources, the reporting period, and the required sign-off path. Security then maps each source to a control environment: who can access it, where it is stored, how it is logged, and what prevents alteration. Compliance validates that the evidence set is complete, dated, and consistent with the reporting obligation.
The practical question is not who “owns CSRD,” but who owns each control that makes evidence reliable. That usually includes:
- source system ownership for sustainability, finance, HR, and supplier data;
- role-based access and segregation of duties for evidence repositories;
- logging and monitoring for changes, exports, and approvals;
- retention rules that preserve both the final artefact and the supporting lineage;
- periodic control testing so evidence can survive assurance requests.
Security teams often anchor these controls to NIST SP 800-53 Rev 5 Security and Privacy Controls for access, audit logging, and media protection, while many organisations also map the management system to ISO/IEC 27001:2022 Information Security Management and supporting control detail in ISO/IEC 27002:2022 Information Security Controls. The operational test is whether an evidence package can be reconstructed without relying on memory or side emails. These controls tend to break down when evidence sits in ad hoc spreadsheets and shared drives because lineage, version control, and retention are no longer enforceable at scale.
Common Variations and Edge Cases
Tighter evidence governance often increases process overhead, requiring organisations to balance assurance quality against reporting speed. That tradeoff is especially visible when data is gathered from multiple business units, third-party platforms, or country-level subsidiaries with inconsistent recordkeeping.
Best practice is evolving on how much evidence should be centralised versus kept at source, and there is no universal standard for this yet. For some organisations, a central repository with strict access controls is enough. For others, especially where supplier or financial disclosures are involved, evidence needs to remain in the originating system with hashes, timestamps, and export logs proving integrity. Where CSRD overlaps with AML, KYC, or beneficial ownership workflows, evidence governance may also intersect with the control expectations reflected in the FATF Recommendations. The main edge case is a hybrid model where compliance owns the disclosure narrative but security owns the evidence chain of custody. That works only if responsibilities are documented before the audit cycle begins, not after. Identity and privilege controls become especially important when evidence is assembled by multiple contributors across finance, sustainability, and external assurance teams.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST CSF 2.0 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.OV-01 | CSRD evidence needs governance, oversight, and control ownership across teams. |
| NIST SP 800-53 Rev 5 | AU-2 | Audit events provide the traceability needed to prove evidence integrity. |
Define who owns evidence controls and review them continuously as part of governance.
