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CVE-2010-3971

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style...

9.3 HighPublic exploit

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka "CSS Memory Corruption Vulnerability."

Exploit likelihood

81.7%Down 11.4 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 9.3

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka "CSS Memory Corruption Vulnerability."

Record
CVE-2010-3971
CVSS 2.0
9.3 HighAV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka "CSS Memory Corruption Vulnerability."

Record
CVE-2010-3971
Updated
2026-11-02
EUVDEUVD-2010-3948 No score

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka "CSS Memory Corruption Vulnerability."

Record
EUVD-2010-3948
Updated
2026-11-03
GitHub AdvisoriesGHSA-r6fx-qpgx-pg2w No score

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style...

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka "CSS Memory Corruption Vulnerability."

Record
GHSA-r6fx-qpgx-pg2w
Updated
2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBMicrosoft Internet Explorer 8 - CSS Parser Denial of Service2010-12-08
Exploit-DBMicrosoft Internet Explorer 8 - CSS Parser2010-12-15
Exploit-DBMicrosoft Internet Explorer - CSS Recursive Import Use-After-Free (MS11-003) (Metasploit)2011-02-08
MetasploitMS11-003 Microsoft Internet Explorer CSS Recursive Import Use After Free2010-11-29
PoC in GitHubnektra/CVE-2010-3971-hotpatch2013-08-07

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, Metasploit, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2010-3971 is a high vulnerability (CVSS 9.3) in Microsoft Internet Explorer, published December 22, 2010. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 81.7%, the 99th percentile. No source names a fixed version.

References

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