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Nightmare Eclipse Reveals Identity Amid Microsoft Dispute

Nightmare Eclipse Reveals Identity Amid Microsoft Dispute

First seen 15 Sep 2026, 02:22 UTC

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ThreatCluster AI
ThreatCluster September 15, 2026 at 04:21 UTC
  • Abdelhamid Naceri, aka Nightmare Eclipse, revealed his identity after being fired by Microsoft.
  • He disclosed 14 vulnerabilities, including nine targeting Windows and Defender, amid a legal dispute.
  • Naceri claims his termination cost him over $200,000 and affected his EU residency application.

Abdelhamid Naceri, known as Nightmare Eclipse, disclosed his identity after being fired by Microsoft. He claims his termination cost him over $200,000 and jeopardized his EU residency application. Since April 2026, he has revealed 14 previously unknown software vulnerabilities, including nine affecting Windows and Defender. Naceri alleges that Microsoft delayed shutting down his account to pressure him into a 'legitimate' resignation. He has been vocal about his mental health struggles due to the legal battle and has shared his termination letter, which lacks a clear reason for his dismissal. Microsoft allegedly offered him €55,000 plus a year's salary to drop his case, which he rejected. His ongoing legal fight has raised questions about corporate ethics and employee treatment in tech.

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Timeline

2025-03-01
Naceri receives termination notice
Microsoft informs Naceri of his termination effective June 2025, without a clear reason provided.
Cybernews
2025-06-01
Naceri's employment officially ends
Naceri's employment with Microsoft officially concludes, leading to a legal dispute over termination.
Cybernews
2026-04-01
Naceri begins disclosing vulnerabilities
Naceri starts revealing previously unknown software flaws, including critical vulnerabilities in Windows.
Cybernews
2026-09-13
Naceri's identity revealed
Naceri publicly discloses his identity as Nightmare Eclipse and shares his story on X.
X
2026-09-14
Cybernews article published
Cybernews publishes a detailed account of Naceri's claims and his ongoing legal battle with Microsoft.
Cybernews

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