CVE-2016-1978: mozilla firefox
Vulnerability summary
CVE-2016-1978 is a high (CVSS 7.5) vulnerability in mozilla firefox. EPSS estimates a 2.39% chance of exploitation in the next 30 days, higher than 83.9% of scored vulnerabilities.
Severe, CVSS 7.3 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 4Timeline
- 13-03-2016PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Use-after-free vulnerability in the ssl3_HandleECDHServerKeyExchange function in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, allows remote attackers to cause a denial of service or possibly have unspecified other impact by making an SSL (1) DHE or (2) ECDHE handshake at a time of high memory consumption.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.3HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- OSV · DebianEcosystem advisory · calculated7.3HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS trend
Probability
2.39%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.39% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- firefox< 44.0.2+build1-0ubuntu0.14.04.1
- nss< 2:3.21-0ubuntu0.14.04.1
- thunderbird< 1:38.8.0+build1-0ubuntu0.14.04.1 | < 1:38.8.0+build1-0ubuntu0.16.04.1
Mozilla2 products
- firefox≤ 43.0.4
- network_security_services≤ 3.20.1
Debian1 product
- nss< 2:3.21-1
3 vendors · 6 products
References
25 links- bto.bluecoat.com/security-advisory/sa124X Refsource CONFIRM
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlX Refsource CONFIRM
- www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlX Refsource CONFIRM
- www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlX Refsource CONFIRM
Show all 25 references
- bugzilla.mozilla.org/show_bug.cgi?id=1209546X Refsource CONFIRM