CVE-2026-26137

{"id": "CVE-2026-26137", "cveTags": [{"tags": ["exclusively-hosted-service"], "sourceIdentifier": "secure@microsoft.com"}], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "published": "2026-03-19T21:17:08.050", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26137", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network."}, {"lang": "es", "value": "Falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF) en el Chat Empresarial de Microsoft 365 Copilot permite a un atacante autorizado elevar privilegios sobre una red."}], "lastModified": "2026-03-27T23:17:12.473", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:365_copilot_chat:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "431CBC2E-E9C8-4A85-B619-F7782685F815"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}