How severe is CVE-2009-0552?

CVE-2009-0552 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-0552 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0552?

CVE-2009-0552 primarily affects Microsoft Ie. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0552?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2009-0552 published?

CVE-2009-0552 was published on 2009-04-15 and last updated on 2026-06-16.

CVE-2009-0552

CVE-2009-0552 is a critical-severity vulnerability in Microsoft Ie with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 29% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 29% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Ie
Published: 2009-04-15
Last modified: 2026-06-16

Description

Unspecified vulnerability in Microsoft Internet Explorer 5.01 SP4, 6 SP1, 6 on Windows XP SP2 and SP3, and 6 on Windows Server 2003 SP1 and SP2 allows remote attackers to execute arbitrary code via a web page that triggers presence of an object in memory that was (1) not properly initialized or (2) deleted, aka "Uninitialized Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2009-0552?: Unspecified vulnerability in Microsoft Internet Explorer 5.01 SP4, 6 SP1, 6 on Windows XP SP2 and SP3, and 6 on Windows Server 2003 SP1 and SP2 allows remote attackers to execute arbitrary code via a web page that triggers presence of an object in memory that was (1) not properly initialized or (2) deleted, aka "Uninitialized Memory Corruption Vulnerability."
How severe is CVE-2009-0552?: CVE-2009-0552 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-0552 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0552?: CVE-2009-0552 primarily affects Microsoft Ie. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0552?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2009-0552 published?: CVE-2009-0552 was published on 2009-04-15 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:microsoft:ie:6.0:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp4:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*

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