CVE-2026-66798

Published Aug 28, 2026

Last updated 5 days ago

CVSS medium 4.3

Overview

Description: Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Source: secure@microsoft.com
NVD status: Analyzed
Products: edge_chromium

Risk scores

CVSS 3.1

Type: Secondary
Base score: 4.3
Impact score: 1.4
Exploitability score: 2.8
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Severity: MEDIUM

Weaknesses

secure@microsoft.com: CWE-416

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "6E9AEFC6-9482-4267-97E5-03E734356F37",
            "versionEndExcluding": "152.0.4191.53",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References