{"id":"CVE-2010-3971","aliases":["EUVD-2010-3948","GHSA-r6fx-qpgx-pg2w"],"status":"published","title":"Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style...","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.\"","severity":{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.81663,"percentile":0.99645,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-399"],"published":"2010-12-22T20:00:00Z","modified":"2026-06-16T23:23:55Z","exploits":[{"source":"exploitdb","id":"EDB-15708","title":"Microsoft Internet Explorer 8 - CSS Parser Denial of Service","type":"dos","platform":"windows","date":"2010-12-08","verified":true,"url":"https://www.exploit-db.com/exploits/15708"},{"source":"exploitdb","id":"EDB-15746","title":"Microsoft Internet Explorer 8 - CSS Parser","type":"remote","platform":"windows","date":"2010-12-15","verified":true,"url":"https://www.exploit-db.com/exploits/15746"},{"source":"exploitdb","id":"EDB-16533","title":"Microsoft Internet Explorer - CSS Recursive Import Use-After-Free (MS11-003) (Metasploit)","type":"remote","platform":"windows","date":"2011-02-08","verified":true,"url":"https://www.exploit-db.com/exploits/16533"},{"source":"metasploit","id":"exploit/windows/browser/ms11_003_ie_css_import","title":"MS11-003 Microsoft Internet Explorer CSS Recursive Import Use After Free","type":"exploit","platform":"Windows","date":"2010-11-29","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/windows/browser/ms11_003_ie_css_import"},{"source":"pocgithub","id":"nektra/CVE-2010-3971-hotpatch","title":"nektra/CVE-2010-3971-hotpatch","date":"2013-08-07","url":"https://github.com/nektra/CVE-2010-3971-hotpatch"}],"products":[{"vendor":"microsoft","product":"internet_explorer"}],"references":[{"url":"http://www.kb.cert.org/vuls/id/634956","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","US Government Resource"]},{"url":"http://www.microsoft.com/technet/security/advisory/2488013.mspx","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.exploit-db.com/exploits/15746","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit"]},{"url":"http://blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-risk-of-public-issues-currently-being-tracked-by-the-msrc.aspx","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.breakingpointsystems.com/community/blog/ie-vulnerability/","tags":["x_refsource_MISC","x_transferred","Exploit"]},{"url":"http://support.avaya.com/css/P8/documents/100127294","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2011/0318","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"http://www.exploit-db.com/exploits/15708","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit"]},{"url":"http://www.vupen.com/english/advisories/2010/3156","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Vendor Advisory"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-003","tags":["vendor-advisory","x_refsource_MS","x_transferred"]},{"url":"http://www.securitytracker.com/id?1024922","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.wooyun.org/bugs/wooyun-2010-0885","tags":["x_refsource_MISC","x_transferred","Exploit"]},{"url":"http://seclists.org/fulldisclosure/2010/Dec/110","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Exploit"]},{"url":"http://www.securityfocus.com/bid/45246","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12382","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://secunia.com/advisories/42510","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-3971"},{"url":"http://www.breakingpointsystems.com/community/blog/ie-vulnerability"},{"url":"https://github.com/advisories/GHSA-r6fx-qpgx-pg2w"}],"sources":{"cve":[{"id":"CVE-2010-3971","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.\"","status":"published","published":"2010-12-22T20:00:00Z","modified":"2024-08-07T03:26:12.333Z","updated_at":"2026-11-02T14:33:27.739358Z"}],"euvd":[{"id":"EUVD-2010-3948","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.\"","status":"published","published":"2010-12-22T20:00:00Z","modified":"2024-08-07T03:26:12Z","updated_at":"2026-11-03T01:39:31.987488Z"}],"ghsa":[{"id":"GHSA-r6fx-qpgx-pg2w","title":"Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style...","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.\"","status":"published","published":"2022-05-13T01:07:45Z","modified":"2025-04-11T03:42:27Z","updated_at":"2026-11-02T15:01:06.818128Z"}],"nvd":[{"id":"CVE-2010-3971","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.\"","status":"published","published":"2010-12-22T21:00:17.723Z","modified":"2026-06-16T23:23:55.01Z","cvss":[{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:02:00.37682Z"}]}}