{"id":"CVE-2023-38831","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-38831","generatedAt":"2026-10-31T10:24:10.762Z","title":"RARLAB WinRAR Code Execution Vulnerability","description":"RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts to view a benign file within a ZIP archive. The issue occurs because a ZIP archive may include a benign file (such as an ordinary .JPG file) and also a folder that has the same name as the benign file, and the contents of the folder (which may include executable content) are processed during an attempt to access only the benign file. This was exploited in the wild in April through October 2023.","published":"2023-08-23T17:15:44.000Z","lastModified":"2026-08-05T05:16:39.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-345","CWE-351"],"affected":["rarlab/winrar"],"epss":{"score":0.99815,"percentile":0.99959,"date":"2026-10-30","history":[{"date":"2026-09-24","score":0.99815,"percentile":0.99958}]},"kev":{"listed":true,"dateAdded":"2023-08-24","dueDate":"2023-09-14","knownRansomwareCampaignUse":"Known","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nhttp://www.win-rar.com/singlenewsview.html?&L=0&tx_ttnews%5Btt_news%5D=232&cHash=c5bf79590657e32554c6683296a8e8aa;  https://nvd.nist.gov/vuln/detail/CVE-2023-38831"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 14 September 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://news.ycombinator.com/item?id=37236100","tags":["Issue Tracking"],"source":"cve@mitre.org"},{"url":"https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/","tags":["Exploit","Press/Media Coverage","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/","tags":["Exploit","Press/Media Coverage","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://news.ycombinator.com/item?id=37236100","tags":["Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/","tags":["Exploit","Press/Media Coverage","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/","tags":["Exploit","Press/Media Coverage","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38831","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-38831","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}