How severe is CVE-2008-1086?

CVE-2008-1086 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2008-1086 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-2008-1086?

CVE-2008-1086 primarily affects Microsoft Internet Explorer. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-1086?

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-2008-1086 published?

CVE-2008-1086 was published on 2008-04-08 and last updated on 2026-06-16.

CVE-2008-1086

CVE-2008-1086 is a critical-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 9.3. 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-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 31% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Internet Explorer
Published: 2008-04-08
Last modified: 2026-06-16

Description

The HxTocCtrl ActiveX control (hxvz.dll), as used in Microsoft Internet Explorer 5.01 SP4 and 6 SP1, in Windows XP SP2, Server 2003 SP1 and SP2, Vista SP1, and Server 2008, allows remote attackers to execute arbitrary code via malformed arguments, which triggers memory corruption.

Frequently asked questions

What is CVE-2008-1086?: The HxTocCtrl ActiveX control (hxvz.dll), as used in Microsoft Internet Explorer 5.01 SP4 and 6 SP1, in Windows XP SP2, Server 2003 SP1 and SP2, Vista SP1, and Server 2008, allows remote attackers to execute arbitrary code via malformed arguments, which triggers memory corruption.
How severe is CVE-2008-1086?: CVE-2008-1086 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2008-1086 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-2008-1086?: CVE-2008-1086 primarily affects Microsoft Internet Explorer. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-1086?: 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-2008-1086 published?: CVE-2008-1086 was published on 2008-04-08 and last updated on 2026-06-16.

References

Affected products (15)

cpe:2.3:a:microsoft:internet_explorer:5.01:sp4:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows-nt:2008:*:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows-nt:2008:*:x32:*:*:*:*:*
cpe:2.3:o:microsoft:windows-nt:2008:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp1:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:x64:*:*:*:*:*

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