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A network disruption has impacted certain CNA systems.

On March 21, 2021, CNA determined that it sustained a sophisticated cybersecurity attack. The attack caused a network disruption and impacted certain CNA systems.

Upon learning of the incident, we immediately engaged a team of third-party forensic experts to investigate and determine the full scope of this incident, which is ongoing. We have alerted law enforcement and will be cooperating with them as they conduct their own investigation.

Out of an abundance of caution, we have disconnected our systems from our network, which continue to function. We’ve notified employees and provided workarounds where possible to ensure they can continue operating and serving the needs of our insureds and policyholders to the best of their ability.

We are well into the restoration phase and making significant progress across our internal systems to return our environment to a fully operational state. Importantly, we have restored corporate email and expect it to be fully operational imminently with the restoration of additional critical functions to proceed in the near future. We will continue to update employees and stakeholders on our restoration efforts as information becomes available.

The security of our data and that of our insureds and other stakeholders is of the utmost importance to us. Should we determine that this incident impacted our insureds’ or policyholders’ data, we’ll notify those parties directly.



We have established the following dedicated email inboxes to meet the needs of our insureds and policyholders:




To report a new claim, please contact: 1.877.262.2727, Option 2. For all other losses, please email (not fax) all new losses to

To report Small Business Claims, please email all new losses to or contact: 1.833.366.5262.




For distribution and underwriting support, please contact one of the following:






For U.S. Operations, please contact one of the following or call:






To submit a surety question or to report a surety claim, please contact:



We are committed to keeping you apprised of the latest developments. Thank you for your patience.



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