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Vulnerability record · CVE-2016-1950 · published 13 March 2016

CVE-2016-1950: Mozilla network security services memory buffer overflow vulnerability

Mozilla · Network Security Services

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.

8.8 CVSS 3.0 High EPSS 4.2% · top 9.4% CWE-119 · Memory buffer overflow
8.8CVSS 3.0 base score, v2 6.8
4.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
12Affected product versions listed by NVD
74References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

12 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html Mailing List
http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html Mailing List
http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html Mailing List
http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html Mailing List
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00029.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00050.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00068.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00093.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00016.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0495.html
http://www.debian.org/security/2016/dsa-3510
http://www.debian.org/security/2016/dsa-3520
http://www.debian.org/security/2016/dsa-3688
http://www.mozilla.org/security/announce/2016/mfsa2016-35.html Vendor Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Third Party Advisory
http://www.securityfocus.com/bid/84223
http://www.securitytracker.com/id/1035215
http://www.ubuntu.com/usn/USN-2917-1
http://www.ubuntu.com/usn/USN-2917-2
http://www.ubuntu.com/usn/USN-2917-3
http://www.ubuntu.com/usn/USN-2924-1
http://www.ubuntu.com/usn/USN-2934-1
https://bto.bluecoat.com/security-advisory/sa119
https://bugzilla.mozilla.org/show_bug.cgi?id=1245528 Issue Tracking
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19.2.3_release_notes Release Notes
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21.1_release_notes Release Notes
https://security.gentoo.org/glsa/201605-06
https://support.apple.com/HT206166 Third Party Advisory
https://support.apple.com/HT206167 Third Party Advisory
https://support.apple.com/HT206168 Third Party Advisory
https://support.apple.com/HT206169 Third Party Advisory
http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html Mailing List
http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html Mailing List
http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html Mailing List

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Source: NIST National Vulnerability Database (record CVE-2016-1950), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.