Cloud Atlas Hacker Group Exploiting Office Vulnerabilities to Execute Malicious Code

Cybersecuritynews •Tushar Subhra Dutta • December 19, 2025

The Cloud Atlas advanced persistent threat group has continued its sophisticated campaign targeting organizations across Eastern Europe and Central Asia during the first half of 2025, leveraging outdated Microsoft Office vulnerabilities to deliver multiple backdoor implants. This campaign reveals a coordinated effort to establish persistent access and extract sensitive data from high-value targets. Cloud Atlas, […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Cloud Atlas Targets Organizations Using Microsoft Office Vulnerabilities The Cloud Atlas hacker group has been exploiting outdated Microsoft Office vulnerabilities to deploy backdoor implants in organizations across Eastern Europe and Central Asia during the first half of 2025. This campaign aims to establish persistent access and extract sensitive data from high-value targets. 2 sources 26

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Cloud Atlas Hacker Group Exploiting Office Vulnerabilities to Execute Malicious Code

The full story

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