Mozilla Network Security Services (NSS) before 3.19.1, as used in Mozilla Firefox before 39.0, Firefox ESR 31.x before 31.8 and 38.x before 38.1, and other products, does not properly perform Elliptical Curve Cryptography (ECC) multiplications, which makes it easier for remote attackers to spoof ECDSA signatures via unspecified vectors.
Conclusion & alert: CVE-2015-2730 is rated Moderate Risk (51.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.59%). Core evidence: EPSS rose +3.35% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 0.24% | 3.59% | +3.35% |
| 2 | 2026-01-25 | 0.34% | 0.24% | -0.10% |
| 3 | 2026-01-20 | — | 0.34% | — |
Full EPSS history (11 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-2015-2730 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-2015-2730 |
gentoo
|
normal | CVE-2015-2730: 1 GLSA(s) (201512-10), 4 atom(s) (mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-2730 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2015-2730 |
suse
|
high | CVE-2015-2730 severity important: SUSE including 167 source package names (MozillaFirefox-102.11.0-150200.152.87.1, MozillaFirefox-115.10.0-150200.152.134.1, …), 395 product×package rows across 74 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (74 product lines)): Fixed 377, Known Not Affected 18. | https://www.suse.com/security/cve/CVE-2015-2730/ |
ubuntu
|
medium | CVE-2015-2730 medium priority: Ubuntu including 3 source packages (firefox, nss, thunderbird), 15 status rows across 5 suites (precise, trusty, upstream, utopic, vivid): released 15. | https://ubuntu.com/security/CVE-2015-2730 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| novell | suse_linux_enterprise_software_development_kit | 12.0 | cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:12.0:*:*:*:*:*:*:* |
| 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:*:*:*:*:*:*:* |
| novell | suse_linux_enterprise_desktop | 12.0 | cpe:2.3:o:novell:suse_linux_enterprise_desktop:12.0:*:*:*:*:*:*:* |
| novell | suse_linux_enterprise_server | 11 | cpe:2.3:o:novell:suse_linux_enterprise_server:11:sp4:*:*:*:*:*:* |
| novell | suse_linux_enterprise_server | 12.0 | cpe:2.3:o:novell:suse_linux_enterprise_server:12.0:*:*:*:*:*:*:* |
| mozilla | network_security_services | <= 3.19 | cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* |
| oracle | solaris | 11.3 | cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:* |
| oracle | vm_server | 3.2 | cpe:2.3:o:oracle:vm_server:3.2:*:*:*:*:*:*:* |