Zayo.com & Allstream.com
Attack Intelligence
Zayo.com & Allstream.com was compromised in a ransomware attack attributed to shinyhunters in June 2026. The organization, operating in the Telecommunication sector in United States, was added to the group's data leak site as part of an extortion campaign.
shinyhunters operates as a financially motivated ransomware-as-a-service (RaaS) operation, exfiltrating sensitive data and threatening public disclosure to pressure victims into paying ransom demands.
You wouldn't want us to describe what data was taken from you publicly here. A fair assessment of this breach in terms of criticality is a 9/10. We urge you to reach out. Read our emails. Failure to do so will result in the full publication and we very much intend to carry that out if you do not engage with us. This is a final warning to reach out by 16 June 2026 before we leak along with several annoying (digital) problems that'll come your way. Make the right decision, don't be the next headline. | Updated: 12 June 2026 | Warning: FINAL WARNING PAY OR LEAK
Intelligence correlations link this incident to 1 vulnerability(ies) including CVE-2026-35273, which may have been leveraged as initial access vectors or for lateral movement.