---
schema_version: "secwatch.filing_event.v1"
accession: "0001514416-21-000248"
form_type: "8-K"
ticker: "BAND"
cik: "0001514416"
company_name: "Bandwidth Inc."
filed_at: "2021-09-28T23:59:59+00:00"
generated_at: "2026-06-29T00:58:35.504673+00:00"
event_type: "cyber"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Bandwidth discloses ongoing rolling DDoS attack targeting its communications services

## Summary
- Bandwidth and other critical communications providers targeted by a rolling DDoS attack; mitigation is ongoing.
- CEO David Morken apologized for significant customer impact and assured round-the-clock remediation efforts.
- Real-time updates on the attack are posted at status.bandwidth.com; customers urged to contact support.
- Filing warns of potential legal, reputational, and financial risks from this cybersecurity incident.

## SEC filing metadata
- accession: 0001514416-21-000248
- form_type: 8-K
- ticker: BAND
- cik: 0001514416
- company_name: Bandwidth Inc.
- filed_at: 2021-09-28T23:59:59+00:00
- event_type: cyber
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1514416/000151441621000248/0001514416-21-000248-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1514416/000151441621000248/band-20210928.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001514416-21-000248
- JSON: https://secwatch.observer/filing/0001514416-21-000248.json
- Plain text: https://secwatch.observer/filing/0001514416-21-000248.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.