How severe is CVE-2007-4247?

CVE-2007-4247 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2007-4247 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4247?

CVE-2007-4247 affects Microsoft Windows Vista. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-4247?

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

When was CVE-2007-4247 published?

CVE-2007-4247 was published on 2007-08-08 and last updated on 2026-06-16.

CVE-2007-4247

CVE-2007-4247 is a medium-severity vulnerability in Microsoft Windows Vista with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows Vista
Published: 2007-08-08
Last modified: 2026-06-16

Description

Windows Calendar on Microsoft Windows Vista allows remote attackers to cause a denial of service (NULL dereference and persistent application crash) via a malformed ICS file.

Frequently asked questions

What is CVE-2007-4247?: Windows Calendar on Microsoft Windows Vista allows remote attackers to cause a denial of service (NULL dereference and persistent application crash) via a malformed ICS file.
How severe is CVE-2007-4247?: CVE-2007-4247 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2007-4247 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4247?: CVE-2007-4247 affects Microsoft Windows Vista. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-4247?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-4247 published?: CVE-2007-4247 was published on 2007-08-08 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*

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