CVE-2010-3971
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."
Key facts
- CVSS score
- 9.3 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C- Weakness (CWE)
- CWE-399
- EPSS score
- 81.7% (100th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2010-3948)
- Published
- December 22, 2010
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2010-3948 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / internet explorer
- microsoft / internet explorer
References
- http://blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-risk-of-public-issues-currently-being-tracked-by-the-msrc.aspx
- http://seclists.org/fulldisclosure/2010/Dec/110(Exploit)
- http://secunia.com/advisories/42510(Vendor Advisory)
- http://support.avaya.com/css/P8/documents/100127294
- http://www.breakingpointsystems.com/community/blog/ie-vulnerability/(Exploit)
- http://www.exploit-db.com/exploits/15708(Exploit)
- http://www.exploit-db.com/exploits/15746(Exploit)
- http://www.kb.cert.org/vuls/id/634956(US Government Resource)
- http://www.microsoft.com/technet/security/advisory/2488013.mspx
- http://www.securityfocus.com/bid/45246
- http://www.securitytracker.com/id?1024922
- http://www.vupen.com/english/advisories/2010/3156(Vendor Advisory)
- http://www.vupen.com/english/advisories/2011/0318
- http://www.wooyun.org/bugs/wooyun-2010-0885(Exploit)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-003
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12382
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain