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High

Trellix (McAfee & FireEye) Source Code Breached, RansomHouse Claims Responsibility

On May 8, 2026, the RansomHouse ransomware group publicly claimed responsibility for a cyberattack against Trellix, a leading U.S.

Key points

  • RansomHouse ransomware group publicly claimed responsibility on May 8, 2026.
  • Trellix confirmed unauthorized access to a portion of its internal source code repository.
  • RansomHouse threatened to release sensitive data.

Connected intelligence

Signal brief

Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.

02

Likely method

Ransomware

Threat source not confirmed

03

Potential impact

Potential operational disruption

Availability

Published
May 8, 2026
Updated
Jul 3, 2026
Confidence
High
Evidence
7 sources

Structured assessment

Signal analysis

This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.

Threat source

Threat source not confirmed

Watch ransomware, endpoint compromise and business interruption exposure.

Business impact

Potential operational disruption
Impact area
Availability

Mentioned entities

TrellixTrellixMcAfeeFireEyeSource Code BreachedRansomHouse Claims Responsibility On MayRansomHouseU.S

Quick context

Questions about this signal

What happened in this signal?

On May 8, 2026, the RansomHouse ransomware group publicly claimed responsibility for a cyberattack against Trellix, a leading U.S. cybersecurity company. Trellix had previously confirmed unauthorized access to a portion of its internal source code repository around May 2, 2026. RansomHouse threatened to release sensitive data unless negotiations were initiated, and reportedly published screenshots showing access to internal Trellix services.

When was this signal reported?

Shadow Tier lists May 8, 2026 as the signal date.

Which organization is connected to this signal?

Trellix is the organization connected to this public signal.

Explore Trellix
Which attack pattern is relevant?

This signal is connected to current ransomware incidents based on its reported incident context.

Explore current ransomware incidents