How severe is CVE-2007-3954?

CVE-2007-3954 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2007-3954 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3954?

CVE-2007-3954 primarily affects Microsoft Internet Explorer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-3954?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-3954 published?

CVE-2007-3954 was published on 2007-07-24 and last updated on 2026-06-16.

CVE-2007-3954

CVE-2007-3954 is a medium-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Microsoft Internet Explorer
Published: 2007-07-24
Last modified: 2026-06-16

Description

Argument injection vulnerability in Microsoft Internet Explorer, when running on systems with SeaMonkey installed and certain URIs registered, allows remote attackers to conduct cross-browser scripting attacks and execute arbitrary commands via shell metacharacters in a mailto URI, which are inserted into the command line that is created when invoking SeaMonkey.exe, a related issue to CVE-2007-3670.

Frequently asked questions

What is CVE-2007-3954?: Argument injection vulnerability in Microsoft Internet Explorer, when running on systems with SeaMonkey installed and certain URIs registered, allows remote attackers to conduct cross-browser scripting attacks and execute arbitrary commands via shell metacharacters in a mailto URI, which are inserted into the command line that is created when invoking SeaMonkey.exe, a related issue to CVE-2007-3670.
How severe is CVE-2007-3954?: CVE-2007-3954 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2007-3954 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3954?: CVE-2007-3954 primarily affects Microsoft Internet Explorer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-3954?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-3954 published?: CVE-2007-3954 was published on 2007-07-24 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*

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