Vulnerability Report

CVE-2010-3821

Title: Apple Webkit RCE

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2010-3821.

CWE Category CWE-119

Published Date Nov 22, 2010

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 9.3 CVSS v2.0

Exploit Probability (EPSS)

4.36%

Vulnerability Summary

CVE-2010-3821: WebKit in Apple Safari before 5.0.3 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1.3 on Mac OS X 10.4, does not properly handle the :first-letter pseudo-element in a Cascading Style Sheets (CSS) token sequence, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.

Impacted Vendors

apple 2

webkit 1

Reference Links

http://lists.apple.com/archives/security-announce/2010//Nov/msg00002.html http://lists.apple.com/archives/security-announce/2010//Nov/msg00003.html http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html http://secunia.com/advisories/42314 http://secunia.com/advisories/43068 http://support.apple.com/kb/HT4455 http://support.apple.com/kb/HT4456 http://www.vupen.com/english/advisories/2010/3046 http://www.vupen.com/english/advisories/2011/0212 https://exchange.xforce.ibmcloud.com/vulnerabilities/63360 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12216 http://lists.apple.com/archives/security-announce/2010//Nov/msg00002.html http://lists.apple.com/archives/security-announce/2010//Nov/msg00003.html http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html http://secunia.com/advisories/42314 http://secunia.com/advisories/43068 http://support.apple.com/kb/HT4455 http://support.apple.com/kb/HT4456 http://www.vupen.com/english/advisories/2010/3046 http://www.vupen.com/english/advisories/2011/0212 https://exchange.xforce.ibmcloud.com/vulnerabilities/63360 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12216

CVSS v2.0

Source Entity [email protected]

Severity HIGH

9.3

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:M/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2010-3821 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 29, 2026 MODIFIED

Vulnerability data updated via NVD.

April 11, 2025 MODIFIED

Vulnerability data or affected products updated.

November 22, 2010 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected Stack

No specific products linked.