CVE-2010-3971

highpriority · attend · 76EPSS 0.817 · 100 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

5 exploits · functional

Likely / severe?

81.7% (100th) EPSS

CVSS 9.3 · high

Is it mine?

3 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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."

cvss

Technical severity, 0–10. One row per scoring source.

9.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 10

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:C/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimary

exploits (5)

Public proof-of-concept and weaponised exploit code.

EDB-15708Microsoft Internet Explorer 8 - CSS Parser Denial of Servicefunctional · exploit_db
EDB-15746Microsoft Internet Explorer 8 - CSS Parserfunctional · exploit_db
EDB-16533Microsoft Internet Explorer - CSS Recursive Import Use-After-Free (MS11-003) (Metasploit)functional · exploit_db
exploit/windows/browser/ms11_003_ie_css_importMS11-003 Microsoft Internet Explorer CSS Recursive Import Use After Freefunctional · metasploit
nektra/CVE-2010-3971-hotpatchDo you own security hotfix with Deviare hookingPoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft internet explorer= 7nvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*
microsoft internet explorer= 8nvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2010-12-22modified 2026-06-16

related (3,726)

Related entries.

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+3721 more

references (32)

External citations — patches, advisories, analysis.

scry

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