Status: UPDATED | Advisory ID: CVE-2026-66318
| CVE | CVE-2026-66318 |
| CVSS Score / Version | 8.1 (High) / CVSS v3.1 |
| Updated | 2026-09-20 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is none. |
| Affected products | Microsoft Edge (Chromium-based) |
| Classified as | CWE-346 (Origin Validation Error) |
| Exploitation prediction (EPSS) | 0.36% probability of exploitation in the next 30 days (27% percentile) -- FIRST.org's EPSS model. |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Microsoft | Edge (Chromium-based) |
| Subsystems | General OT |
| Sectors | Multiple |
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.