The JavaScript engine in Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 does not properly handle temporary variables that are not garbage collected, which might allow remote attackers to trigger operations on freed memory and cause memory corruption.
Conclusion & alert: CVE-2006-1742 is rated Moderate Risk (47.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 13.99%, 94th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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 | 2025-03-30 | 29.71% | 13.99% | -15.72% |
| 2 | 2025-03-29 | 13.99% | 29.71% | +15.72% |
| 3 | 2025-03-17 | — | 13.99% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
medium | CVE-2006-1742 medium priority: Debian including 2 source packages (firefox, thunderbird), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. | https://security-tracker.debian.org/tracker/CVE-2006-1742 |
gentoo
|
normal | CVE-2006-1742: 3 GLSA(s) (200604-12, 200604-18, 200605-09), 6 atom(s) (mail-client/mozilla-thunderbird, mail-client/mozilla-thunderbird-bin, www-client/mozilla, www-client/mozilla-bin, www-client/mozilla-firefox, www-client/mozilla-firefox-bin); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2006-1742 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2006-1742 |
ubuntu
|
medium | CVE-2006-1742 medium priority: Ubuntu including 6 source packages (firefox, firefox-granparadiso, lightning-sunbird, midbrowser, mozilla-thunderbird, xulrunner), 24 status rows across 4 suites (dapper, edgy, feisty, upstream): DNE 10, needs-triage 6, released 6, not-affected 2. | https://ubuntu.com/security/CVE-2006-1742 |
: Fixed in: Firefox 1.5 Firefox 1.0.8 Thunderbird 1.5 Thunderbird 1.0.8 SeaMonkey 1.0 Mozilla Suite 1.7.13
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mozilla | firefox | <= 1.0.7 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | firefox | 1.0 | cpe:2.3:a:mozilla:firefox:1.0:*:*:*:*:*:*:* |
| mozilla | firefox | 1.0.1 | cpe:2.3:a:mozilla:firefox:1.0.1:*:*:*:*:*:*:* |
| mozilla | firefox | 1.0.2 | cpe:2.3:a:mozilla:firefox:1.0.2:*:*:*:*:*:*:* |
| mozilla | firefox | 1.0.3 | cpe:2.3:a:mozilla:firefox:1.0.3:*:*:*:*:*:*:* |
| mozilla | firefox | 1.0.4 | cpe:2.3:a:mozilla:firefox:1.0.4:*:*:*:*:*:*:* |
| mozilla | firefox | 1.0.5 | cpe:2.3:a:mozilla:firefox:1.0.5:*:*:*:*:*:*:* |
| mozilla | firefox | 1.0.6 | cpe:2.3:a:mozilla:firefox:1.0.6:*:*:*:*:*:*:* |
| mozilla | firefox | 1.5 | cpe:2.3:a:mozilla:firefox:1.5:*:*:*:*:*:*:* |
| mozilla | firefox | 1.5 | cpe:2.3:a:mozilla:firefox:1.5:beta1:*:*:*:*:*:* |
| mozilla | firefox | 1.5 | cpe:2.3:a:mozilla:firefox:1.5:beta2:*:*:*:*:*:* |
| mozilla | mozilla_suite | <= 1.7.12 | cpe:2.3:a:mozilla:mozilla_suite:*:*:*:*:*:*:*:* |
| mozilla | mozilla_suite | 1.7.6 | cpe:2.3:a:mozilla:mozilla_suite:1.7.6:*:*:*:*:*:*:* |
| mozilla | mozilla_suite | 1.7.7 | cpe:2.3:a:mozilla:mozilla_suite:1.7.7:*:*:*:*:*:*:* |
| mozilla | mozilla_suite | 1.7.8 | cpe:2.3:a:mozilla:mozilla_suite:1.7.8:*:*:*:*:*:*:* |
| mozilla | mozilla_suite | 1.7.10 | cpe:2.3:a:mozilla:mozilla_suite:1.7.10:*:*:*:*:*:*:* |
| mozilla | mozilla_suite | 1.7.11 | cpe:2.3:a:mozilla:mozilla_suite:1.7.11:*:*:*:*:*:*:* |
| mozilla | seamonkey | <= 1.0 | cpe:2.3:a:mozilla:seamonkey:*:beta:*:*:*:*:*:* |
| mozilla | seamonkey | 1.0 | cpe:2.3:a:mozilla:seamonkey:1.0:*:alpha:*:*:*:*:* |
| mozilla | thunderbird | <= 1.0.7 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0 | cpe:2.3:a:mozilla:thunderbird:1.0:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0.1 | cpe:2.3:a:mozilla:thunderbird:1.0.1:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0.2 | cpe:2.3:a:mozilla:thunderbird:1.0.2:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0.3 | cpe:2.3:a:mozilla:thunderbird:1.0.3:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0.4 | cpe:2.3:a:mozilla:thunderbird:1.0.4:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0.5 | cpe:2.3:a:mozilla:thunderbird:1.0.5:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0.5 | cpe:2.3:a:mozilla:thunderbird:1.0.5:beta:*:*:*:*:*:* |
| mozilla | thunderbird | 1.0.6 | cpe:2.3:a:mozilla:thunderbird:1.0.6:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.5 | cpe:2.3:a:mozilla:thunderbird:1.5:*:*:*:*:*:*:* |
| mozilla | thunderbird | 1.5 | cpe:2.3:a:mozilla:thunderbird:1.5:beta2:*:*:*:*:*:* |