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CVE-2026-57981 is a high-severity remote code execution vulnerability in Microsoft Edge (Chromium-based) caused by a use-after-free condition. The available content identifies the flaw as a memory-safety issue in Edge that can allow an unauthorized attacker to execute code. Specific vulnerable components or functions are not provided in the supplied material. Microsoft included a fix for this issue in the July 2026 Edge Stable channel security update, which brought Edge to version 150.0.4078.48.
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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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free remote code execution vulnerability in Microsoft Edge.
A high-severity remote code execution vulnerability affecting Microsoft Edge (Chromium-based).
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.