How severe is CVE-2011-1251?

CVE-2011-1251 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-1251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1251?

CVE-2011-1251 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-1251?

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-2011-1251 published?

CVE-2011-1251 was published on 2011-06-16 and last updated on 2026-06-16.

CVE-2011-1251

CVE-2011-1251 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 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-908.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-908
Affected product: Microsoft Internet Explorer
Published: 2011-06-16
Last modified: 2026-06-16

Description

Microsoft Internet Explorer 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "DOM Manipulation Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2011-1251?: Microsoft Internet Explorer 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "DOM Manipulation Memory Corruption Vulnerability."
How severe is CVE-2011-1251?: CVE-2011-1251 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-1251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1251?: CVE-2011-1251 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-1251?: 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-2011-1251 published?: CVE-2011-1251 was published on 2011-06-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Internet Explorer

CVE-2014-1764 — Critical (CVSS 10.0): Microsoft Internet Explorer 7 through 11 allows remote attackers to execute arbitrary code and bypass a sandbox…
CVE-2014-1763 — Critical (CVSS 10.0): Use-after-free vulnerability in Microsoft Internet Explorer 9 through 11 allows remote attackers to execute arbitrary…
CVE-2010-1118 — Critical (CVSS 10.0): Unspecified vulnerability in Internet Explorer 8 on Microsoft Windows 7 allows remote attackers to execute arbitrary…
CVE-2009-1918 — Critical (CVSS 10.0): Microsoft Internet Explorer 5.01 SP4 and 6 SP1; Internet Explorer 6 for Windows XP SP2 and SP3 and Server 2003 SP2; and…
CVE-2009-1043 — Critical (CVSS 10.0): Unspecified vulnerability in Microsoft Internet Explorer 8 on Windows 7 allows remote attackers to execute arbitrary…
CVE-2007-3341 — Critical (CVSS 10.0): Unspecified vulnerability in the FTP implementation in Microsoft Internet Explorer allows remote attackers to "see a…

All CVEs affecting Microsoft Internet Explorer →

Other CWE-908 (Use of Uninitialized Resource) vulnerabilities

CVE-2025-1942 — Critical (CVSS 9.8): When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated…
CVE-2024-47540 — Critical (CVSS 9.8): GStreamer is a library for constructing graphs of media-handling components. An uninitialized stack variable…
CVE-2024-32611 — Critical (CVSS 9.8): HDF5 Library through 1.14.3 may use an uninitialized value in H5A__attr_release_table in H5Aint.c.
CVE-2023-24941 — Critical (CVSS 9.8): Windows Network File System Remote Code Execution Vulnerability
CVE-2022-26437 — Critical (CVSS 9.8): In httpclient, there is a possible out of bounds write due to uninitialized data. This could lead to remote escalation…
CVE-2021-45703 — Critical (CVSS 9.8): An issue was discovered in the tectonic_xdv crate before 0.1.12 for Rust. XdvParser::<T>::process may read from…

Browse all CWE-908 (Use of Uninitialized Resource) vulnerabilities →