CVE-2026-21537

{"id": "CVE-2026-21537", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21537", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-02-11T04:55:57.681192Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Microsoft Defender for Endpoint for Linux", "versions": [{"status": "affected", "version": "101.0.0", "lessThan": "1.0.9.0", "versionType": "custom"}]}]}], "published": "2026-02-10T18:16:35.970", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21537", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-94"}]}], "descriptions": [{"lang": "en", "value": "Improper control of generation of code ('code injection') in Microsoft Defender for Linux allows an unauthorized attacker to execute code over an adjacent network."}, {"lang": "es", "value": "Control inadecuado de la generaci\u00f3n de c\u00f3digo ('inyecci\u00f3n de c\u00f3digo') en Microsoft Defender para Linux permite a un atacante no autorizado ejecutar c\u00f3digo a trav\u00e9s de una red adyacente."}], "lastModified": "2026-06-17T10:18:48.350", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:defender_for_endpoint:-:*:*:*:*:linux:*:*", "vulnerable": true, "matchCriteriaId": "1EFDA019-FE81-4CBC-8B31-E8F9C42272A4"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}