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CVE-2026-57974 is a high-severity remote code execution vulnerability in Microsoft Edge (Chromium-based) caused by an integer overflow or wraparound condition. The flaw affects Edge versions prior to 150.0.4078.48. Specific vulnerable code paths are not publicly described in the available information, but the issue class indicates that improper handling of integer arithmetic can lead to incorrect memory sizing, bounds calculation, or related unsafe state, ultimately enabling code execution in the browser context when processing attacker-controlled content.
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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.
An integer overflow remote code execution vulnerability in Microsoft Edge.
A remote code execution vulnerability affecting Microsoft Edge (Chromium-based), with a CVSS 3.1 base score of 8.8 (High).
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.