{"data":{"id":"df18cdaa-a0a2-4bc2-9755-2edbc6857338","title":"Microsoft says Office bug exposed customers’ confidential emails to Copilot AI","summary":"Microsoft discovered a bug that allowed Copilot (an AI chat feature in Office software) to read and summarize customers' confidential emails without permission for several weeks, even when data loss prevention policies (rules meant to block sensitive information from being sent to AI systems) were in place. The bug affected emails labeled as confidential and was tracked internally as CW1226324.","solution":"Microsoft said it began rolling out a fix for the bug earlier in February.","labels":["security","privacy"],"sourceUrl":"https://techcrunch.com/2026/02/18/microsoft-says-office-bug-exposed-customers-confidential-emails-to-copilot-ai/","publishedAt":"2026-02-18T14:44:28.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"high","attackType":["pii_leakage"],"issueType":"news","affectedPackages":null,"affectedVendors":["Microsoft"],"affectedVendorsRaw":["Microsoft","Microsoft 365 Copilot","Copilot Chat","Office"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":["confidentiality"],"aiComponentTargeted":"api","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":null,"atlasIds":null}}