Argument injection vulnerability in Microsoft Internet Explorer, when running on systems with Firefox installed and certain URIs registered, allows remote attackers to conduct cross-browser scripting attacks and execute arbitrary commands via shell metacharacters in a (1) FirefoxURL or (2) FirefoxHTML URI, which are inserted into the command line that is created when invoking firefox.exe. NOTE: it has been debated as to whether the issue is in Internet Explorer or Firefox. As of 20070711, it is CVE's opinion that IE appears to be failing to properly delimit the URL argument when invoking Firefox, and this issue could arise with other protocol handlers in IE as well. However, Mozilla has stated that it will address the issue with a "defense in depth" fix that will "prevent IE from sending Firefox malicious data."
Conclusion & alert: CVE-2007-3670 is rated High Exploit Risk (61.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 28.65%, 98th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). 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 |
|---|---|---|---|---|
| 30285 | exploit_db | edb | 2007-07-10 | 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 | 56.59% | 28.65% | -27.95% |
| 2 | 2026-06-12 | 56.04% | 56.59% | +0.56% |
| 3 | 2026-06-07 | — | 56.04% | — |
Full EPSS history (30 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 |
|---|---|---|---|
suse
|
medium | CVE-2007-3670 severity moderate: SUSE including 25 source package names (MozillaFirefox-10.0-0.3.2, MozillaFirefox-140.2.0-160000.1.2, …), 25 product×package rows across 7 product lines (SUSE Linux Enterprise Server 11 SP1, SUSE Linux Enterprise Server 11 SP2, … (7 product lines)): Fixed 25. | https://www.suse.com/security/cve/CVE-2007-3670/ |
ubuntu
|
medium | CVE-2007-3670 medium priority: Ubuntu including 3 source packages (firefox, midbrowser, mozilla-thunderbird), 12 status rows across 4 suites (dapper, edgy, feisty, upstream): released 6, DNE 3, needs-triage 3. | https://ubuntu.com/security/CVE-2007-3670 |
: Successful exploit requires that Mozilla Firefox is installed.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | internet_explorer | 6 | cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:* |
| microsoft | internet_explorer | 6 | cpe:2.3:a:microsoft:internet_explorer:6:sp1:*:*:*:*:*:* |
| microsoft | internet_explorer | 7.0 | cpe:2.3:a:microsoft:internet_explorer:7.0:*:*:*:*:*:*:* |
| microsoft | internet_explorer | 7.0 | cpe:2.3:a:microsoft:internet_explorer:7.0:beta1:*:*:*:*:*:* |
| microsoft | internet_explorer | 7.0 | cpe:2.3:a:microsoft:internet_explorer:7.0:beta2:*:*:*:*:*:* |
| microsoft | internet_explorer | 7.0 | cpe:2.3:a:microsoft:internet_explorer:7.0:beta3:*:*:*:*:*:* |
| mozilla | firefox | — | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |