{"id":"CVE-2026-101283","title":"iperf3 3.20–3.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the …","summary":"iperf3 3.20–3.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the …","severity":"critical","cvss":9.2,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-122"],"vendor":"esnet","product":"iperf3","affected":["iperf3 3.20","iperf3 3.21"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T22:16:33.317","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101283","references":[{"url":"https://newreleases.io/project/github/esnet/iperf/release/3.22","label":"98a01053-8a31-4f6d-9aa9-252be161adc6"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-30T22:27:27.820Z","slug":"CVE-2026-101283","body":"## Overview\n\niperf3 3.20–3.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":50.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}