Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does not properly restrict public values in Diffie-Hellman key exchanges, which makes it easier for remote attackers to bypass cryptographic protection mechanisms in ticket handling by leveraging use of a certain value.
Conclusion & alert: CVE-2014-1491 is rated High Exploit Risk (68/100): CVSS Medium severity, with high exploitation likelihood (EPSS 4.66%, 91th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +4.14% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.53% | 4.66% | +4.14% |
| 2 | 2026-03-27 | 0.45% | 0.53% | +0.08% |
| 3 | 2026-03-13 | — | 0.45% | — |
Full EPSS history (41 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2014-1491 not yet assigned priority: Debian including 1 source packages (nss), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2014-1491 |
gentoo
|
normal | CVE-2014-1491: 1 GLSA(s) (201504-01), 7 atom(s) (dev-libs/nspr, mail-client/thunderbird, …); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-1491 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2014-1491 |
suse
|
medium | CVE-2014-1491 severity moderate: SUSE including 163 source package names (MozillaFirefox-140.2.0-160000.1.2, MozillaFirefox-24.3.0esr-0.4.2.1, …), 251 product×package rows across 47 product lines (SUSE Linux Enterprise Desktop 11 SP3, SUSE Linux Enterprise Desktop 12, … (47 product lines)): Fixed 215, Known Not Affected 36. | https://www.suse.com/security/cve/CVE-2014-1491/ |
ubuntu
|
medium | CVE-2014-1491 medium priority: Ubuntu including 3 source packages (firefox, nss, thunderbird), 15 status rows across 5 suites (lucid, precise, quantal, saucy, upstream): released 9, not-affected 4, ignored 2. | https://ubuntu.com/security/CVE-2014-1491 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mozilla | firefox | < 24.3 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | firefox | < 27.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | network_security_services | < 3.15.4 | cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* |
| mozilla | seamonkey | < 2.24 | cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:* |
| mozilla | thunderbird | < 24.3.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | < 12.1.4 | cpe:2.3:a:oracle:enterprise_manager_ops_center:*:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | 12.2.0 | cpe:2.3:a:oracle:enterprise_manager_ops_center:12.2.0:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | 12.2.1 | cpe:2.3:a:oracle:enterprise_manager_ops_center:12.2.1:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | 12.3.0 | cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.0:*:*:*:*:*:*:* |
| oracle | vm_server | 3.2 | cpe:2.3:a:oracle:vm_server:3.2:*:*:*:*:*:x86:* |
| fedoraproject | fedora | 19 | cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:* |
| fedoraproject | fedora | 20 | cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:* |
| opensuse | opensuse | 11.4 | cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:* |
| opensuse | opensuse | 12.3 | cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.1 | cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* |
| suse | linux_enterprise_desktop | 11 | cpe:2.3:o:suse:linux_enterprise_desktop:11:sp3:*:*:*:*:*:* |
| suse | linux_enterprise_server | 11 | cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:*:*:* |
| suse | linux_enterprise_server | 11 | cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:vmware:*:* |
| suse | linux_enterprise_software_development_kit | 11 | cpe:2.3:o:suse:linux_enterprise_software_development_kit:11:sp3:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 12.10 | cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 13.10 | cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:* |