{"data":{"id":"3eb6d5f9-d833-4ade-be68-effa707ff3a3","title":"CVE-2026-21521: Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose inf","summary":"CVE-2026-21521 is a vulnerability in Microsoft Copilot where improper handling of escape sequences (special characters used to control how text is displayed or interpreted) allows an attacker to disclose information over a network without authorization. The vulnerability is classified as CWE-150 (improper neutralization of escape, meta, or control sequences) and was reported by Microsoft Corporation.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21521","publishedAt":"2026-01-22T23:15:57.823Z","cveId":"CVE-2026-21521","cweIds":["CWE-150"],"cvssScore":"7.4","cvssSeverity":"high","severity":"high","attackType":["pii_leakage"],"issueType":"vulnerability","affectedPackages":null,"affectedVendors":["Microsoft"],"affectedVendorsRaw":["Microsoft Copilot"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0.00064,"patchAvailable":null,"disclosureDate":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality"],"aiComponentTargeted":"api","llmSpecific":true,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}