{"id":"CVE-2021-30833","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-30833","generatedAt":"2026-10-27T20:19:19.595Z","title":"Unpacking a maliciously crafted archive may allow an attacker to write arbitrary files.","description":"This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.0.1. Unpacking a maliciously crafted archive may allow an attacker to write arbitrary files.","published":"2021-10-28T19:15:09.000Z","lastModified":"2026-06-17T03:50:58.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},"cwe":[],"affected":["apple/mac os x","apple/macos"],"epss":{"score":0.42674,"percentile":0.98704,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 42.7%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://support.apple.com/en-us/HT212869","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/kb/HT212871","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/kb/HT212872","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212869","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212871","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212872","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-30833","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."}