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Microsoft Copilot security flaw replaced with tested backdoor

A security vulnerability in Microsoft Copilot was discovered, stemming from a bug accidentally left in production during testing. The issue was addressed by replacing the initial security flaw with a more sophisticated, obfuscated backdoor that underwent three months of testing. AI

IMPACT This incident highlights potential security risks in AI-powered tools and the complex methods used to address them.

RANK_REASON The item discusses a security issue and its resolution within a specific software product, not a broader industry trend or frontier release.

Read on Mastodon — fosstodon.org →

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Microsoft Copilot security flaw replaced with tested backdoor

COVERAGE [1]

  1. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    "It was just a bug created during testing, accidently left in production. We fixed it by replacing this security hole with a much better obfuscated backdoor tha

    "It was just a bug created during testing, accidently left in production. We fixed it by replacing this security hole with a much better obfuscated backdoor that we spent 3 months testing." https:// arstechnica.com/security/2026/ 08/microsoft-copilot-reveals-secret-input-that-all…