{"id":"CVE-2021-30919","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-30919","generatedAt":"2026-10-27T22:33:15.368Z","title":"An out-of-bounds write was addressed with improved input validation.","description":"An out-of-bounds write was addressed with improved input validation. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. Processing a maliciously crafted PDF may lead to arbitrary code execution.","published":"2021-08-24T19:15:19.000Z","lastModified":"2026-06-17T03:51:08.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","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-787"],"affected":["apple/ipad os","apple/ipados","apple/iphone os","apple/mac os x","apple/macos","apple/tvos","apple/watchos"],"epss":{"score":0.01574,"percentile":0.75256,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://support.apple.com/en-us/HT212867","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212868","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212869","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212871","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212872","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212874","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212876","source":"product-security@apple.com"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-22-357/","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212867","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212868","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212869","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212871","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212872","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212874","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212876","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-22-357/","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-30919","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."}