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        "cveId": "CVE-2026-8863",
        "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "state": "PUBLISHED",
        "assignerShortName": "certcc",
        "dateReserved": "2026-05-18T19:41:10.790Z",
        "datePublished": "2026-06-09T18:10:15.426Z",
        "dateUpdated": "2026-06-10T15:16:35.228Z"
    },
    "containers": {
        "cna": {
            "title": "CVE-2026-8863",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass. An attacker with administrative privileges or the ability to modify the boot process could use one of the vulnerable shim bootloaders to bypass Secure Boot protections and execute arbitrary code before the operating system loads. Specific UEFI DBX update is required to block these vulnerable boot loaders."
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "affected": [
                {
                    "vendor": "Oracle Corporation",
                    "product": "OracleLinux(7.2) shim",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0.9"
                        }
                    ]
                },
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                    "vendor": "PC-Doctor",
                    "product": "Service Center Enterprise",
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                            "status": "affected",
                            "version": "14",
                            "lessThanOrEqual": "17.0.7536.900",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "PC-Doctor",
                    "product": "Service Center Drive Erase",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "15",
                            "lessThanOrEqual": "17.0.7538.592",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "PC-Doctor",
                    "product": "Service Center Japan",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "15",
                            "lessThanOrEqual": "17.0.7539.904",
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                    "vendor": "PC-Doctor",
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                    "vendor": "PC-Doctor",
                    "product": "Network Factory for Linux (Bootable Diagnostics)",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "6.9",
                            "lessThanOrEqual": "6.20.7711.267",
                            "versionType": "custom"
                        }
                    ]
                },
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                    "vendor": "PC-Doctor",
                    "product": "Factory for Linux (Bootable Diagnostics)",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "6.9",
                            "lessThanOrEqual": "6.20.7710.267",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "Spyrus",
                    "product": "WTGCreator",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "4.2"
                        }
                    ]
                },
                {
                    "vendor": "Blancco UK",
                    "product": "WhiteCanyon WipeDrive",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "8.0.0",
                            "lessThanOrEqual": "8.1.3",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "baramundi software",
                    "product": "baramundi Management Suite",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "*",
                            "lessThanOrEqual": "2024R1",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "SUSE Linux",
                    "product": "OpenSUSE shim",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0.9"
                        }
                    ]
                },
                {
                    "vendor": "Finland Matriculation Board",
                    "product": "Abitti 1",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "1.0.0"
                        }
                    ]
                },
                {
                    "vendor": "NTC IT ROSA LLC",
                    "product": "RosaLinux",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "R9"
                        }
                    ]
                },
                {
                    "vendor": "NTC IT ROSA LLC",
                    "product": "RosaLinux",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "R10"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-347: Improper Verification of Cryptographic Signature"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-354: Improper Validation of Integrity Check Value"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-8863",
                    "name": "Microsoft Vendor Security Advisory",
                    "tags": [
                        "vendor-advisory"
                    ]
                },
                {
                    "url": "https://kb.cert.org/vuls/id/616257",
                    "name": "CERT/CC Vulnerability Notice",
                    "tags": [
                        "third-party-advisory"
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                }
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                "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-8863"
            },
            "credits": [
                {
                    "lang": "en",
                    "value": "Thanks to Martin Smolar of ESET for discovering and reporting this vulnerability",
                    "type": "finder"
                }
            ],
            "providerMetadata": {
                "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
                "shortName": "certcc",
                "dateUpdated": "2026-06-10T15:16:35.228Z"
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        "adp": [
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.8,
                            "attackVector": "LOCAL",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "LOW",
                            "confidentialityImpact": "HIGH"
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                            "content": {
                                "timestamp": "2026-06-09T19:03:03.811729Z",
                                "id": "CVE-2026-8863",
                                "options": [
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                                        "Exploitation": "none"
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                    "dateUpdated": "2026-06-09T19:03:21.716Z"
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            {
                "title": "CVE Program Container",
                "references": [
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