{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-14266", "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "state": "PUBLISHED", "assignerShortName": "zdi", "dateReserved": "2026-06-30T18:43:50.027Z", "datePublished": "2026-07-29T17:17:13.649Z", "dateUpdated": "2026-07-30T03:55:31.679Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "shortName": "zdi", "dateUpdated": "2026-07-29T17:17:13.649Z"}, "title": "7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability", "descriptions": [{"lang": "en", "value": "7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169."}], "affected": [{"vendor": "7-Zip", "product": "7-Zip", "versions": [{"version": "26.01", "status": "affected"}], "defaultStatus": "unknown"}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-122", "description": "CWE-122: Heap-based Buffer Overflow", "type": "CWE"}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-444/", "name": "ZDI-26-444", "tags": ["x_research-advisory"]}], "dateAssigned": "2026-06-30T18:43:50.105Z", "datePublic": "2026-07-15T21:47:29.811Z", "source": {"lang": "en", "value": "Lunbun LLC (Landon Peng)"}, "metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}}]}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/07/17/12"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-29T17:30:32.742Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-29T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-14266"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-30T03:55:31.679Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/07/17/12"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-29T17:30:32.742Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-14266", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-29T18:09:02.527655Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-29T18:09:07.535Z"}}], "cna": {"title": "7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability", "source": {"lang": "en", "value": "Lunbun LLC (Landon Peng)"}, "metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "baseScore": 7, "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}}], "affected": [{"vendor": "7-Zip", "product": "7-Zip", "versions": [{"status": "affected", "version": "26.01"}], "defaultStatus": "unknown"}], "datePublic": "2026-07-15T21:47:29.811Z", "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-444/", "name": "ZDI-26-444", "tags": ["x_research-advisory"]}], "dateAssigned": "2026-06-30T18:43:50.105Z", "descriptions": [{"lang": "en", "value": "7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-122", "description": "CWE-122: Heap-based Buffer Overflow"}]}], "providerMetadata": {"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "shortName": "zdi", "dateUpdated": "2026-07-29T17:17:13.649Z"}}}, "cveMetadata": {"cveId": "CVE-2026-14266", "state": "PUBLISHED", "dateUpdated": "2026-07-29T18:09:11.010Z", "dateReserved": "2026-06-30T18:43:50.027Z", "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "datePublished": "2026-07-29T17:17:13.649Z", "assignerShortName": "zdi"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "7-Zip", "vendor": "7-Zip", "versions": [{"status": "affected", "version": "26.01"}]}], "source": "[email protected]"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:*", "matchCriteriaId": "FCB07733-189C-477A-B66A-548C42B39D26", "versionEndExcluding": "26.02", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169."}], "id": "CVE-2026-14266", "lastModified": "2026-08-07T20:48:32.290", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "[email protected]", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "[email protected]", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-14266", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-29T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-07-29T18:16:50.720", "references": [{"source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-444/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/07/17/12"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "[email protected]", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "26.01"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "7-Zip", "source": "cna", "vendor": "7-Zip"}, "product": "7-zip", "vendor": "7-zip"}], "created": "2026-07-29T18:30:05.206217+00:00", "updated": "2026-08-12T01:00:04.010278+00:00", "vendors": ["7-zip", "7-zip$PRODUCT$7-zip"]}