{"id":"CVE-2021-3580","title":"A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext","summary":"A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-20","CWE-20"],"vendor":"nettle_project","product":"nettle","affected":["nettle < 3.7.3","enterprise_linux = 7.0","enterprise_linux = 8.0","debian_linux = 9.0","ontap_select_deploy_administration_utility"],"patched":["nettle 3.7.3"],"published":"2021-08-05","updated":"2026-10-14","sourceUpdated":"2026-10-14T10:17:45.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-3580","references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1967983","label":"secalert@redhat.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html","label":"secalert@redhat.com"},{"url":"https://security.gentoo.org/glsa/202401-24","label":"secalert@redhat.com"},{"url":"https://security.netapp.com/advisory/ntap-20211104-0006/","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1967983","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202401-24","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20211104-0006/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd"],"epss":0.02708,"epssPercentile":0.85608,"ingestedAt":"2026-10-14T10:25:41.192Z","slug":"CVE-2021-3580","body":"## Overview\n\nA flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.\n\n## Affected\n\n- `nettle < 3.7.3`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `debian_linux = 9.0`\n- `ontap_select_deploy_administration_utility`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `nettle 3.7.3`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.5,"exploitation":0,"ransomware":0},"changes":[]}