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A remote code execution vulnerability in Microsoft Internet Explorer, and also affecting the legacy EdgeHTML-based Microsoft Edge engine, caused by memory corruption when the browser processes a specially crafted web page. The flaw is triggered through web content rendered by the browser and has been described as enabling shellcode execution within the renderer process. Public exploit code became available rapidly and the vulnerability was subsequently observed in active exploitation by exploit kits and targeted intrusion activity. Successful exploitation can corrupt memory and execute attacker-controlled code in the security context of the current user.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Internet Explorer vulnerability also used in ransomware attacks in the described campaign context.
A remote code execution exploit delivered via a malicious HTML page linked from spear-phishing documents, used to execute/fetch the next-stage loader in the MATA infection chain.
A previously weaponized vulnerability mentioned only as an example of Magnitude's tendency to reuse vulnerabilities first seen in targeted attacks.
A memory corruption vulnerability in Internet Explorer that can be triggered by viewing a specially crafted website.
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.