High 8.8Published Mar 13, 2016

CVE-2016-1950Heap-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, all…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects mozilla network_security_services and 11 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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: 8.8 HIGH (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

mozilla network_security_services mozilla:network_security_services	3.19.2; 3.20; 3.20.1; 3.21	NVD
mozilla firefox mozilla:firefox	through 44.0.2; 38.0; 38.0.1; 38.0.5; 38.1.0; 38.1.1; 38.2.0; 38.2.1; and 6 more ranges	NVD
oracle linux oracle:linux	5.0; 6; 7; 5.0; 6; 7	NVD
oracle vm_server oracle:vm_server	3.2	NVD
apple iphone_os apple:iphone_os	through 9.2.1	NVD
apple mac_os_x apple:mac_os_x	through 10.11.3	NVD
apple tvos apple:tvos	through 9.1	NVD
apple watchos apple:watchos	through 2.1	NVD
oracle glassfish_server oracle:glassfish_server	2.1.1	NVD
oracle iplanet_web_proxy_server oracle:iplanet_web_proxy_server	4.0	NVD
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References

References

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
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.