CVE-2011-1257

CVE-2011-1257 is a high-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 7.6. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-362.

Key facts

Description

Race condition in Microsoft Internet Explorer 6 through 8 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors involving access to an object, aka "Window Open Race Condition Vulnerability."

Frequently asked questions

What is CVE-2011-1257?
Race condition in Microsoft Internet Explorer 6 through 8 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors involving access to an object, aka "Window Open Race Condition Vulnerability."
How severe is CVE-2011-1257?
CVE-2011-1257 has a CVSS 2.0 base score of 7.6, rated high severity.
Is CVE-2011-1257 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-2011-1257?
CVE-2011-1257 primarily affects Microsoft Internet Explorer. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1257?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-1257 published?
CVE-2011-1257 was published on 2011-08-10 and last updated on 2026-06-16.

References

Affected products (3)

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