# U.S. Puts Up to $10 Million Bounty on Chinese National Accused in HAFNIUM Microsoft Hacks

*Thursday, October 8, 2026 at 8:07 AM UTC — Hamer Intelligence Services Desk*

**Published**: 2026-10-08T08:07:47.923Z (1h ago)
**Category**: cyber | **Region**: Global
**Importance**: 8/10
**Sources**: OSINT
**Permalink**: https://hamerintel.com/data/articles/19995.md
**Source**: https://hamerintel.com/summaries

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**Deck**: The United States is offering up to $10 million for information on Zhang Yu, a Chinese national accused of coordinating hacking operations linked to China’s intelligence service and tied to the HAFNIUM group’s Microsoft Exchange intrusions.

Washington is escalating pressure on a Chinese hacking suspect it links to one of the most damaging espionage operations against Microsoft Exchange servers.

The U.S. has offered a reward of up to $10 million for information leading to the capture of Zhang Yu, a Chinese national charged over the HAFNIUM Microsoft Exchange hacks. Prosecutors accuse Zhang of coordinating hacking operations associated with China’s intelligence apparatus.

The HAFNIUM intrusions exploited vulnerabilities in Microsoft Exchange, compromising email servers and exposing data at a large number of organizations worldwide. U.S. authorities say the campaign gave Chinese-linked operators a foothold in government, corporate and other networks.

By placing a multimillion-dollar bounty on Zhang, the United States is treating the case as a high-priority national security threat. The reward offer is intended to draw tips from around the world on his whereabouts and networks.

The move also serves a signaling function toward Beijing. Washington is naming individual operators it links to Chinese state-backed hacking and is prepared to pursue them over the long term, including through public indictments and financial incentives for information.

For companies and public bodies that rely on enterprise email systems, the case underlines how a single widely used product can become a gateway for large-scale espionage if attackers find and exploit structural weaknesses.

Developments to watch include whether any associates of Zhang are named in additional U.S. cases, whether allies issue parallel measures, and how China responds to the public reward for a citizen accused of working in support of its intelligence services.