---
title: "CVE-2010-3971: Use-after-free vulnerability… | CubePath"
description: "Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft…"
language: en
source: https://cubepath.com/security/cve/CVE-2010-3971
---

# CVE-2010-3971: Use-after-free vulnerability… | CubePath

## Description

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."

Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2010-3971)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.81663 (81.7% probability)

Percentile

99.6%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [VU#634956](http://www.kb.cert.org/vuls/id/634956)  (kb.cert.org) third-party-advisory
- [microsoft.com/technet/security/advisory/2488013.mspx](http://www.microsoft.com/technet/security/advisory/2488013.mspx)
- [15746](http://www.exploit-db.com/exploits/15746)  (exploit-db.com) exploit
- [blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-ri…](http://blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-risk-of-public-issues-currently-being-tracked-by-the-msrc.aspx)
- [breakingpointsystems.com/community/blog/ie-vulnerability](http://www.breakingpointsystems.com/community/blog/ie-vulnerability/)
- [support.avaya.com/css/P8/documents/100127294](http://support.avaya.com/css/P8/documents/100127294)
- [ADV-2011-0318](http://www.vupen.com/english/advisories/2011/0318)  (vupen.com) vdb-entry
- [15708](http://www.exploit-db.com/exploits/15708)  (exploit-db.com) exploit
- [ADV-2010-3156](http://www.vupen.com/english/advisories/2010/3156)  (vupen.com) vdb-entry
- [MS11-003](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-003)  (docs.microsoft.com) vendor-advisory
- [1024922](http://www.securitytracker.com/id?1024922)  (securitytracker.com) vdb-entry
- [wooyun.org/bugs/wooyun-2010-0885](http://www.wooyun.org/bugs/wooyun-2010-0885)
- [20101208 IE CSS parser dos bug](http://seclists.org/fulldisclosure/2010/Dec/110)  (seclists.org) mailing-list
- [45246](http://www.securityfocus.com/bid/45246)  (securityfocus.com) vdb-entry
- [oval:org.mitre.oval:def:12382](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12382)  (oval.cisecurity.org) vdb-entry signature
- [42510](http://secunia.com/advisories/42510)  (secunia.com) third-party-advisory

## Timeline

1. ID reserved Oct 14, 2010
2. Record published Dec 22, 2010
3. Record last updated Aug 7, 2024

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:59 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)