ACSC/CISA Joint Advisory: Russian State-Sponsored Zimbra Phishing Campaign
The Australian Cyber Security Centre (ACSC) joined CISA and international partners in a joint advisory detailing Russian state-sponsored exploitation of Zimbra Collaboration Suite by the threat actor tracked as LAUNDRY BEAR. The campaign targets sensitive email data. The ACSC specifically highlighted risks to Australian organisations and critical infrastructure.
Key Details
- Source: ACSC (joint advisory)
- Date: 2026-07-24
- Reliability: Tier 1 — Official / first-party
- Threat actor: LAUNDRY BEAR (Russian state-sponsored)
- Target: Zimbra Collaboration Suite
- Objective: Theft of sensitive email data
- Australian relevance: ACSC explicitly warned Australian organisations and critical infrastructure operators
Analysis
The exploitation of Zimbra Collaboration Suite is a persistent vector for state-sponsored threat actors. This joint advisory follows a pattern of coordinated international action against Russian cyber espionage operations and underscores the elevated risk to email infrastructure in the critical sector.
Mitigations
Organisations running Zimbra Collaboration Suite should: - Apply latest patches and updates - Enable multi-factor authentication - Monitor for indicators of compromise as detailed in the ACSC advisory - Review email access logs for anomalous activity
Cross-References
- Devman Raas Portal Centralises Payload Builds Victim Management And Affiliate Pa — Russian cybercrime ecosystem, broader context
Source
- ACSC — https://www.cyber.gov.au/
- Raw digest: Cyber Digest 2026 07 27