CVE•Published 2026-08-04•Modified 2026-08-06•1 article on news•4 live references•NVD data

CVE-2026-66318Microsoft · Edge_chromium

Vulnerability data via NVD (ingested)

CVSS v3.1

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS percentile

Exploit Prediction Scoring System · top 71% of all CVEs

Weaknesses (CWE)

CWE-346Origin Validation Error

Description

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

Timeline

Published 2026-08-04

Modified 2026-08-06

External references

NVD MITRE Exploit-DB VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-66318

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Microsoft Edge Chromium"

All exposed Microsoft Edge Chromium instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Edge Chromium"

HTTP body or banner mentions "Edge Chromium" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-66318

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2026-66318

Censys host search filtered to this CVE id.

grep.app

CVE-2026-66318

Public source-code mentions — fast PoC discovery.

GitHub code

CVE-2026-66318

GitHub code search for direct mentions.

Google dork

"CVE-2026-66318" exploit -site:nvd.nist.gov

Write-ups and news, NVD excluded.

Known PoCs on GitHub

No public proof-of-concept repositories found for CVE-2026-66318 on GitHub.