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🔇 '''Silent cyber''' refers to [[Definition:Cyber risk | cyber risk]] that lurks inside traditional [[Definition:Insurance policy | insurance policies]] not originally designed to cover technology-related [[Definition:Loss | losses]]. A [[Definition:Property insurance | property]], [[Definition:General liability insurance | general liability]], or [[Definition:Marine insurance | marine]] policy may lack an explicit cyber inclusion or exclusion, creating ambiguity about whether a cyber event—such as a [[Definition:Ransomware | ransomware]] attack that triggers physical damage—would be covered. This unintended, often unpriced [[Definition:Exposure | exposure]] poses a significant accumulation threat to [[Definition:Insurance carrier | carriers]] and [[Definition:Reinsurance | reinsurers]] alike.

🔍 The problem surfaces when a cyber incident causes consequences that fall within a traditional policy's [[Definition:Insuring agreement | insuring agreement]]. A [[Definition:Malware | malware]]-induced failure in an industrial control system, for example, might destroy equipment covered under a [[Definition:Commercial property insurance | commercial property]] form. Because the [[Definition:Policy wording | policy wording]] neither affirms nor denies cyber as a [[Definition:Peril | peril]], the [[Definition:Policyholder | policyholder]] files a [[Definition:Claim | claim]] and the insurer faces a coverage dispute. Regulators such as [[Definition:Lloyd's of London | Lloyd's]] have responded by requiring [[Definition:Underwriter | underwriters]] to classify every policy as either affirmatively covering or explicitly excluding cyber, forcing the industry to confront the gap.

⚠️ Left unaddressed, silent cyber can distort an insurer's [[Definition:Risk aggregation | aggregated risk]] picture, because standard [[Definition:Catastrophe modeling | catastrophe models]] historically did not account for digital contagion cascading across lines of business. Identifying and remediating these exposures has become a governance priority: carriers now audit legacy portfolios, attach explicit [[Definition:Cyber exclusion | cyber exclusions]] or sub-limits, and develop standalone [[Definition:Cyber insurance | cyber]] products to capture the [[Definition:Premium | premium]] that matches the risk. The effort marks a broader shift toward deliberate, transparent [[Definition:Affirmative cyber coverage | affirmative coverage]] in an increasingly interconnected world.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Cyber insurance]]
* [[Definition:Affirmative cyber coverage]]
* [[Definition:Risk aggregation]]
* [[Definition:Policy wording]]
* [[Definition:Systemic risk]]
* [[Definition:Lloyd's of London]]
{{Div col end}}

Definition:Silent cyber - Revision history

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