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CVE-2026-57981 is a high-severity use-after-free vulnerability in Microsoft Edge (Chromium-based). According to the provided content, the flaw allows an unauthorized attacker to execute code in the context of the browser. It is categorized as a remote code execution vulnerability and carries a CVSS v3.1 base score of 8.8. The available material does not identify the specific vulnerable function, component, or code path, but it does establish that the issue is memory-safety related and affects Microsoft Edge prior to the July 2026 security update that brought Stable channel builds 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.
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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.