Bottom line: Insurers are increasingly using configuration errors in IT infrastructure as legal grounds to deny or reduce cyber damage claims.
Cyber insurers are taking a rigorous approach to IT forensics in 2026 and verify after damage claims whether insured parties comply with contractually guaranteed security standards. A single configuration error can result in coverage denial.
The cyber insurance market is experiencing a phase of massive restriction in 2026. While earlier policies were often concluded with superficial questionnaires, underwriting and claims management have fundamentally tightened. Rising damage sums from organized ransomware extortions forced providers to rigorously verify compliance with contractually guaranteed security standards.
In the event of a claim, insurers deploy specialized IT forensics teams that not only reconstruct the immediate breach pathway but examine the exact state of the entire IT infrastructure at the time of the incident. If it turns out that the insured company has not maintained the documented technical minimum standards comprehensively and permanently, insurers use this as grounds for coverage denial or drastic benefit reduction. Legally, assurance companies rely on Section 28 of the German Insurance Contract Act, which regulates breach of contractual obligations. A single configuration error can thus place the financial risk of a complete cyber loss back on the affected company.
Multi-factor authentication (MFA) is considered an elementary core requirement of modern cyber policies. Companies routinely confirm in the application process that all administrative access is protected by this security mechanism. Forensic investigations, however, frequently reveal a dangerous discrepancy: orphaned administrator accounts, temporary test accounts from service providers, or forgotten service accounts were overlooked during MFA implementation. If attackers gain access to even one of these unprotected accounts, the contractual MFA guarantee is deemed broken. Additionally, insurers criticize the use of outdated MFA methods such as SMS-based one-time codes or push notifications, which can be bypassed through social engineering or exhaustion attacks (MFA fatigue).
Business continuity strategies are a prerequisite for regulating business interruption losses. Insurers demand not only the mere existence of data backups, but specify the architectural conditions: immutability and strict logical network segregation of backup systems are central. A common configuration error is the direct coupling of backup servers to the primary directory structure, which transfers encryption damage from ransomware attacks directly into backups and thereby nullifies their protective function.
Source: www.it-daily.net · Published June 29, 2026
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