Internet Explorer CSS clip Attribute Use-After-Free RCE
CVE-2010-3962 is a use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8. The flaw is triggered by crafted web content involving Cascading Style Sheets (CSS) token sequences and the clip attribute, and has also been described as an "invalid flag reference" issue or an "Uninitialized Memory Corruption Vulnerability." By causing Internet Explorer to reference freed memory during processing of malicious HTML/CSS content, a remote attacker can corrupt memory and gain control of execution flow. Microsoft and subsequent reporting noted that the vulnerability was exploited in the wild in November 2010.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free memory corruption vulnerability in Internet Explorer 6–8 that enables remote code execution via crafted web content.
A historical Internet Explorer zero-day (IE6–IE8) referenced as previously used to deliver the Pirpi backdoor payload.
A historical Internet Explorer zero-day (IE6–IE8) previously used to deliver the Pirpi backdoor payload.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.