Dear Ontology Community,

The Ontology core development team has identified a potential security concern during our daily security check that requires immediate investigation.

As a precautionary measure, and with the security and integrity of the Ontology Mainnet as our highest priority, block production on the Ontology Mainnet will be temporarily suspended with immediate effect.

This emergency pause is being initiated proactively to allow the technical team and network validators to conduct a comprehensive security review of the network and its related components.

No Current Impact on User Assets

We would like to emphasize that:

• No confirmed security incident has been identified at this time.
• There is currently no indication of any loss or compromise of user assets.
• ONT, ONG, and other on-chain assets remain unaffected based on our current assessment.
• The temporary suspension is a preventive security measure, rather than a response to confirmed asset loss or an ongoing attack.

We are taking this action out of an abundance of caution to ensure that any potential risk is fully assessed before normal network operations resume.

Network Status

During the emergency security review:

• Block production will remain temporarily suspended.
• On-chain transactions will not be processed while the network is paused.
• Users should not attempt to perform time-sensitive on-chain transactions until the network has been officially confirmed to have resumed.
• Users do not need to transfer or otherwise take action with their ONT, ONG, or other on-chain assets as a result of this announcement.

The duration of the pause is currently undetermined. We will prioritize the thoroughness of the security review over speed and will not resume block production until the network has been sufficiently assessed and deemed safe to operate.

Next Steps

The Ontology team is treating this matter as a top priority and is working closely with validators and relevant ecosystem partners.

We will provide further updates through the official Ontology channels as soon as more information becomes available.

A separate announcement will be issued before or at the time of network resumption, once the security review and any required upgrades have been successfully completed.

We understand that an unexpected network pause may cause concern or inconvenience. However, we believe that taking immediate preventive action is the responsible approach when the security of the network may potentially be at risk.

The security and integrity of the Ontology Mainnet, as well as the safety of user assets, remain our highest priorities.

Thank you for your patience, understanding, and continued support.

Ontology Network