PT-2026-55635 · Microsoft · Edge

Kugelblitz · Published 2026-07-03 · Updated 2026-07-04 · CVE-2026-58289

Positive Technologies (AI Summary)

CVSS v3.1

9.0

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Edge (Chromium-based) (affected versions not specified)

Description An issue involving type confusion, which occurs when a program accesses a resource using a type that is incompatible with the actual type of the resource, exists in Microsoft Edge (Chromium-based). This allows an unauthorized attacker to execute arbitrary code over a network.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

CVE-2026-58289

Affected Products

Edge

References · 7

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58289 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-58289 · Security Note
• https://twitter.com/infoflowcloud/status/2073271121818915053 · Twitter Post
• https://twitter.com/CVEnew/status/2073269630244921708 · Twitter Post
• https://twitter.com/UpwindMDR/status/2073293878363295835 · Twitter Post
• https://twitter.com/SecurityAr58409/status/2073210944910409760 · Twitter Post
• https://twitter.com/OrizonCyber/status/2073157365247983791 · Twitter Post