{"cve":"CVE-2013-1740","nvd":{"published":"2014-01-18T22:55:03.117","modified":"2026-06-16T23:52:02.373","status":"Modified","description":"The ssl_Do1stHandshake function in sslsecur.c in libssl in Mozilla Network Security Services (NSS) before 3.15.4, when the TLS False Start feature is enabled, allows man-in-the-middle attackers to spoof SSL servers by using an arbitrary X.509 certificate during certain handshake traffic.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-310"],"references":["http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00004.html","http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00005.html","http://seclists.org/fulldisclosure/2014/Dec/23","http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html","http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html"],"products":["mozilla:network_security_services"],"source":"nvd","synced_at":"2026-10-19T20:32:06.812358378+00:00"},"epss":{"cve":"CVE-2013-1740","score":0.01664,"percentile":0.76714,"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."]}