Summary
- Environment: Cloud hosting
- Operational impact: Hosted Exchange email outage for thousands of customers
- Financial impact: No financial figure is established by the reviewed source evidence
- Record status: Developing record. Reviewed September 19, 2026; updated as evidence emerges.
What happened
Impact
- Documented impact: Hosted Exchange email outage for thousands of customers. [1]
- No financial loss, ransom amount, recovery cost, or regulatory penalty is established by the reviewed source evidence.
Threat Group & Attack Vector
The retained source describes the attack path as follows: Play ransomware; ProxyNotShell Exchange zero-day. The canonical record does not add intrusion steps beyond those supported by the source. [1]
Actors
- Play ransomware — identified in the supported attack description. [1]
TTPs
- T1486 — Data Encrypted for Impact — mapped from the cited behavior. [1]
- T1190 — Exploit Public-Facing Application — mapped from the cited behavior. [1]
Response
The retained source describes containment action intended to limit further access or disruption. [1] The retained source describes a forensic or specialist investigation of the incident. [1]
This account is bounded to Rackspace Technology Form 10-K. Details absent from that evidence are left unresolved rather than inferred. [1]