Microsoft Grapples with Security Lapses and China Layoffs Even as Anthropic’s Fable 5 Debuts on Azure

Microsoft stock falls 13% YTD as a GitHub breach forces 73 repos offline and 400 layoffs in China, offsetting optimism from the Claude Fable 5 AI model launch.

Microsoft’s stock continues to trade under pressure, weighed down by a security breach that forced the company to take 73 GitHub repositories offline and a fresh round of job cuts in China. The shares have slipped roughly 13% since the start of the year, hovering near €348-€350 — well below both the 50-day moving average of €351 and the 200-day line that signals longer-term weakness.

The Miasma worm infiltrated Microsoft’s Azure organizations on GitHub after attackers compromised a user account. They planted malicious files in the “Azure/durabletask” area, targeting AI developer tools such as Claude Code and VS Code. Microsoft confirmed the takedown on June 8, but the vulnerability had been exploited once before in May; incomplete remediation allowed the perpetrators to return. The incident raises fresh questions about the security posture of Azure’s development ecosystem.

At the same time, Microsoft is cutting up to 400 employees in Beijing and Shanghai, with affected staff leaving on July 6. This marks the third round of layoffs in China in two years, driven by tightening data regulations and escalating U.S.-China tensions that make it harder for American cloud providers to handle sensitive information. The company’s AI research division, however, remains untouched.

On the product front, Microsoft launched Anthropic’s most powerful language model, Claude Fable 5, on its Azure Foundry platform on June 9. The model supports a context window of up to one million tokens and scored 80.3% on the SWE-Bench Pro benchmark — 11 points higher than its predecessor, Opus 4.8. Stripe, the fintech firm, used Fable 5 to migrate a 50-million-line codebase in a single day — a task that would have taken two months manually. The model includes a safety architecture that routes roughly 5% of sessions to the fallback Opus 4.8 when cybersecurity or chemical risk filters are triggered.

Despite the technical advances, the stock failed to find a bid. The relative strength index stands at 43.2, indicating neither oversold conditions nor momentum. Institutional activity has been mixed: Allstate Corp doubled its Microsoft stake to about 538,000 shares, and Summitry LLC edged up its position, while CEO Judson Althoff sold 15,500 shares on June 1 at an average price of $460.99.

Analyst consensus remains a “Moderate Buy” with 41 buy ratings versus six holds and a median price target of $561.20. BNP Paribas expects growing demand for AI infrastructure to push Azure’s growth toward the mid-40% range if pricing for frontier models evolves favorably. Microsoft itself reported a backlog of $627 billion, and analysts project fiscal 2026 revenue of roughly $330 billion.

Separately, the company is addressing headwinds in its gaming division. New Xbox chief Asha Sharma cut Game Pass subscription prices and scrapped unpopular AI initiatives. She also recruited industry veteran Matthew Ball as strategy chief to revive legacy game franchises. And on Thursday, Microsoft is set to pay a quarterly dividend of $0.91 per share.

Chartists note that at current levels, the stock is more than 25% below its all-time high. The Miasma worm incident, combined with the China layoffs and AI chief Mustafa Suleyman’s backtrack on earlier predictions that AI would rapidly eliminate office jobs, have kept sentiment cautious even as the company’s long-term product pipeline — including the Majorana-2 quantum processor and Copilot’s rollout to 505,000 NHS England users — continues to expand.