{ "document": { "acknowledgments": [ { "names": [ "Cristhian Parrot with Kroll" ] } ], "aggregate_severity": { "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Public", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en-US", "notes": [ { "category": "general", "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle", "title": "Additional Resources" }, { "category": "legal_disclaimer", "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.", "title": "Disclaimer" }, { "category": "general", "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.", "title": "Customer Action" } ], "publisher": { "category": "vendor", "contact_details": "secure@microsoft.com", "name": "Microsoft Security Response Center", "namespace": "https://msrc.microsoft.com" }, "references": [ { "category": "self", "summary": "CVE-2026-42830 Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42830" }, { "category": "self", "summary": "CVE-2026-42830 Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42830.json" }, { "category": "external", "summary": "Microsoft Exploitability Index", "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1" }, { "category": "external", "summary": "Microsoft Support Lifecycle", "url": "https://support.microsoft.com/lifecycle" }, { "category": "external", "summary": "Common Vulnerability Scoring System", "url": "https://www.first.org/cvss" } ], "title": "Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability", "tracking": { "current_release_date": "2026-05-12T07:00:00.000Z", "generator": { "date": "2026-05-14T18:07:42.036Z", "engine": { "name": "MSRC Generator", "version": "1.0" } }, "id": "msrc_CVE-2026-42830", "initial_release_date": "2026-05-12T07:00:00.000Z", "revision_history": [ { "date": "2026-05-12T07:00:00.000Z", "legacy_version": "1", "number": "1", "summary": "Information published." } ], "status": "final", "version": "1" } }, "product_tree": { "branches": [ { "branches": [ { "category": "product_version_range", "name": "<1.42.0", "product": { "name": "Azure Monitor Agent Metrics Extension <1.42.0", "product_id": "1" } }, { "category": "product_version", "name": "1.42.0", "product": { "name": "Azure Monitor Agent Metrics Extension 1.42.0", "product_id": "21301" } } ], "category": "product_name", "name": "Azure Monitor Agent Metrics Extension" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-42830", "cwe": { "id": "CWE-426", "name": "Untrusted Search Path" }, "notes": [ { "category": "general", "text": "Microsoft", "title": "Assigning CNA" }, { "category": "faq", "text": "This primarily impacts integrity, as an attacker could execute unauthorized code and modify system behavior or trusted processes. There is no direct impact to confidentiality, as the scenario does not inherently provide access to sensitive data, and no impact to availability, as exploitation does not inherently disrupt service operation.", "title": "According to the CVSS metrics, successful exploitation of this vulnerability could lead to no loss of confidentiality (C:N) and availability (A:N), but could lead to major loss of integrity (I:H). What does that mean for this vulnerability?" }, { "category": "faq", "text": "An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.", "title": "According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?" }, { "category": "faq", "text": "The OpenSSL configuration auto‑loading behavior allows extension modules (such as MetricsExtension) to load automatically. Therefore, if an attacker was able to place a malicious DLL in a location referenced by the configuration, it could get loaded implicitly, that could result in arbitrary code execution with elevated privileges.", "title": "What privileges an attacker could gain with a successful exploitation?" } ], "product_status": { "fixed": [ "21301" ], "known_affected": [ "1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-42830 Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42830" }, { "category": "self", "summary": "CVE-2026-42830 Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42830.json" } ], "remediations": [ { "category": "vendor_fix", "date": "2026-05-12T07:00:00.000Z", "details": "1.42.0:Security Update:https://learn.microsoft.com/en-us/azure/azure-monitor/agents/azure-monitor-agent-extension-versions", "product_ids": [ "1" ], "url": "https://learn.microsoft.com/en-us/azure/azure-monitor/agents/azure-monitor-agent-extension-versions" } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "environmentalsScore": 0.0, "exploitCodeMaturity": "UNPROVEN", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "remediationLevel": "OFFICIAL_FIX", "reportConfidence": "CONFIRMED", "scope": "CHANGED", "temporalScore": 5.7, "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C", "version": "3.1" }, "products": [ "1" ] } ], "threats": [ { "category": "impact", "details": "Elevation of Privilege" }, { "category": "exploit_status", "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely" } ], "title": "Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability" } ] }