How severe is CVE-2009-1918?

CVE-2009-1918 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-1918 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1918?

CVE-2009-1918 primarily affects Microsoft Internet Explorer. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1918?

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-2009-1918 published?

CVE-2009-1918 was published on 2009-07-29 and last updated on 2026-06-16.

CVE-2009-1918

CVE-2009-1918 is a critical-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 43% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 43% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Internet Explorer
Published: 2009-07-29
Last modified: 2026-06-16

Description

Microsoft Internet Explorer 5.01 SP4 and 6 SP1; Internet Explorer 6 for Windows XP SP2 and SP3 and Server 2003 SP2; and Internet Explorer 7 and 8 for Windows XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 do not properly handle table operations, which allows remote attackers to execute arbitrary code via a crafted HTML document that triggers memory corruption by adding malformed elements to an empty DIV element, related to the getElementsByTagName method, aka "HTML Objects Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2009-1918?: Microsoft Internet Explorer 5.01 SP4 and 6 SP1; Internet Explorer 6 for Windows XP SP2 and SP3 and Server 2003 SP2; and Internet Explorer 7 and 8 for Windows XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 do not properly handle table operations, which allows remote attackers to execute arbitrary code via a crafted HTML document that triggers memory corruption by adding malformed elements to an empty DIV element, related to the getElementsByTagName method, aka "HTML Objects Memory Corruption Vulnerability."
How severe is CVE-2009-1918?: CVE-2009-1918 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-1918 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1918?: CVE-2009-1918 primarily affects Microsoft Internet Explorer. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1918?: 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-2009-1918 published?: CVE-2009-1918 was published on 2009-07-29 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.01:sp4:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

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