{"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"}}]}}