{"cve":"CVE-2020-12783","nvd":{"published":"2020-05-11T14:15:11.917","modified":"2026-06-17T02:52:18.117","status":"Modified","description":"Exim through 4.93 has an out-of-bounds read in the SPA authenticator that could result in SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-125"],"references":["http://www.openwall.com/lists/oss-security/2021/05/04/7","https://bugs.exim.org/show_bug.cgi?id=2571","https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86","https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0","https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html"],"products":["canonical:ubuntu_linux","debian:debian_linux","exim:exim","fedoraproject:fedora"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-12783","score":0.04553,"percentile":0.91591,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}