PT-2026-54783 · Microsoft · Edge

Gnas0X0018 + 1 · Published 2026-06-26 · Updated 2026-07-03 · CVE-2026-50521

Positive Technologies (AI Summary)

CVSS v3.1

8.3

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Name of the Vulnerable Software and Affected Versions Microsoft Edge (Chromium-based) versions prior to 149.0.4022.98

Description A use-after-free issue exists in Microsoft Edge (Chromium-based). This flaw allows an authorized attacker to execute arbitrary code over a network. Use-after-free is a memory corruption flaw that occurs when an application continues to use a pointer after it has been freed, which can be exploited to redirect program execution.

Recommendations Update to version 149.0.4022.98 or later.

Fix

RCE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-50521

Affected Products

Edge

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-50521 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-50521 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50521 · Vendor Advisory
• https://twitter.com/vuldb/status/2072532002457416191 · Twitter Post
• https://twitter.com/infoflowcloud/status/2072442859387486267 · Twitter Post
• https://twitter.com/CVEnew/status/2072441315321614504 · Twitter Post
• https://twitter.com/YogSoth0/status/2072528834369376393 · Twitter Post
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-50521 · Note
• https://t.me/cveNotify/185696 · Telegram Post
• https://twitter.com/YogSoth0/status/2072751066970575283 · Twitter Post