CVE-2016-1950: Apple iPhone OS

High severity, CVSS 8.8. EPSS: 4.2% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Mozilla Network Security Services (NSS) before 3.19.2.3 and 3.20.x and 3.21.x before 3.21.1, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to execute arbitrary code via crafted ASN.1 data in an X.509 certificate.

Affected products

• Apple iPhone OS: up to and including 9.2.1
• Apple Mac OS X: up to and including 10.11.3
• Apple tvOS: up to and including 9.1
• Apple watchOS: up to and including 2.1
• Mozilla Firefox: up to and including 44.0.2; version 38.0 only; version 38.0.1 only; version 38.0.5 only; version 38.1.0 only; version 38.1.1 only; …
• Mozilla Network Security Services: version 3.19.2 only; version 3.20 only; version 3.20.1 only; version 3.21 only
• Opensuse Opensuse: version 13.1 only
• Oracle Glassfish Server: version 2.1.1 only
• Oracle Iplanet Web Proxy Server: version 4.0 only
• Oracle Iplanet Web Server: version 7.0 only
• Oracle Linux: version 5.0 only; version 6 only; version 7 only
• Oracle Vm Server: version 3.2 only

Published 2016-03-13. Last modified 2026-06-17.