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Global Financial Service Disruptions

Circle

stablecoin issuer · US · Global · Circle Internet Group

UnexplainedStatus: resolvedTier 2Severity 1 of 5Evidence confidence: highAnalyst-verified

Circle's Cross-Chain Transfer Protocol attestation service for EVM-origin USDC transfers was degraded from 19:46 to 21:35 UTC on 21 Oct 2026, followed by a re-attestation delay until 22 Oct.

First disruption
Oct 21 19:46 UTC
First public signal
Oct 21 19:46 UTC (status page)
Acknowledged
Oct 21 19:46 UTC
Restored
Oct 21 21:35 UTC
Duration
1.8 hours
DFX first recorded
Nov 5 14:58 UTC

What was restricted

transfers outcross borderScope: single service

CCTP attestations for transfers from EVM source chains delayed or partially unavailable; a re-attestation issue followed until 22 Oct 19:24 UTC.

Cause, kept in separate layers

What the institution said
none given
DFX classification
Unexplained (cyber: unconfirmed)

Evidence

Other restrictions at Circle