How severe is CVE-2007-3903?

CVE-2007-3903 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2007-3903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 31% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3903?

CVE-2007-3903 primarily affects Microsoft Ie. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-3903?

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

When was CVE-2007-3903 published?

CVE-2007-3903 was published on 2007-12-12 and last updated on 2026-06-16.

CVE-2007-3903

CVE-2007-3903 is a medium-severity vulnerability in Microsoft Ie with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 31% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 31% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Microsoft Ie
Published: 2007-12-12
Last modified: 2026-06-16

Description

Microsoft Internet Explorer 6 and 7 allows remote attackers to execute arbitrary code via uninitialized or deleted objects used in repeated calls to the (1) cloneNode or (2) nodeValue JavaScript function, a different issue than CVE-2007-3902 and CVE-2007-5344, a variant of "Uninitialized Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2007-3903?: Microsoft Internet Explorer 6 and 7 allows remote attackers to execute arbitrary code via uninitialized or deleted objects used in repeated calls to the (1) cloneNode or (2) nodeValue JavaScript function, a different issue than CVE-2007-3902 and CVE-2007-5344, a variant of "Uninitialized Memory Corruption Vulnerability."
How severe is CVE-2007-3903?: CVE-2007-3903 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2007-3903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 31% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3903?: CVE-2007-3903 primarily affects Microsoft Ie. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-3903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-3903 published?: CVE-2007-3903 was published on 2007-12-12 and last updated on 2026-06-16.

References

Affected products (17)

cpe:2.3:a:microsoft:ie:6.0:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:ie:6.0:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6.0.2600:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6.0.2800:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6.0.2800.1106:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6.0.2900:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6.0.2900.2180:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7.0:beta:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7.0:beta1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7.0:beta2:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7.0:beta3:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7.0.5730.11:*:*:*:*:*:*:*

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CVE-2007-0219 — Critical (CVSS 10.0): Microsoft Internet Explorer 5.01, 6, and 7 uses certain COM objects from (1) Msb1fren.dll, (2) Htmlmm.ocx, and (3)…
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CVE-2004-0216 — Critical (CVSS 10.0): Integer overflow in the Install Engine (inseng.dll) for Internet Explorer 5.01, 5.5, and 6 allows remote attackers to…

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Other CWE-399 (Resource Management Errors) vulnerabilities

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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