CVE-2010-3962

Exp

Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.

Published: 2010-11-05 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2010-3962 is rated Critical Active Threat (92.4/100): CVSS High severity, with high exploitation likelihood (EPSS 96.89%, 100th percentile). CISA KEV confirms active exploitation (added 2025-10-06) affecting Microsoft / Internet Explorer. a weakness (CWE-416) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2010-3962

Name: Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability · CISA KEV detail

Exploit added: 2025-10-06

Action due: 2025-10-27

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public exploit references (Exploit-DB) for CVE-2010-3962

EDB-ID Source Kind Published Link
16551 exploit_db edb 2011-01-20 Exploit-DB ↗
15421 exploit_db edb 2010-11-04 Exploit-DB ↗
15418 exploit_db edb 2010-11-04 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2010-3962

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-16 96.83% 96.89% +0.06%
2 2026-06-15 89.68% 96.83% +7.15%
3 2026-05-22 — 89.68% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-3962

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2010-3962

Affected software / configurations for CVE-2010-3962

Vendor Product Version Raw CPE
microsoft internet_explorer 6 cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*
microsoft internet_explorer 7 cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
microsoft internet_explorer 8 cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

References for CVE-2010-3962

URL Tags
http://blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases-security-advisory-2458511.aspx Vendor Advisory
http://secunia.com/advisories/42091 Broken Link Vendor Advisory
http://www.exploit-db.com/exploits/15418 Third Party Advisory VDB Entry
http://www.exploit-db.com/exploits/15421 Third Party Advisory VDB Entry
http://www.kb.cert.org/vuls/id/899748 Third Party Advisory US Government Resource
http://www.microsoft.com/technet/security/advisory/2458511.mspx Patch Vendor Advisory
http://www.securityfocus.com/bid/44536 Broken Link Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1024676 Broken Link Third Party Advisory VDB Entry
http://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacks Not Applicable
http://www.us-cert.gov/cas/techalerts/TA10-348A.html Third Party Advisory US Government Resource
http://www.vupen.com/english/advisories/2010/2880 Broken Link Vendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090 Patch Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/62962 Third Party Advisory VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12279 Tool Signature
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-3962 US Government Resource
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