Affects Microsoft Edge (Chromium-based), a widely used product; enables remote code execution via network.
CVE-2026-58284
Edge Chromium: remote code execution via improper authorization.
Is CVE-2026-58284 being exploited?
Not confirmed. CVE-2026-58284 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.56% probability of exploitation in the next 30 days.
How severe is CVE-2026-58284?
CVE-2026-58284 is rated High with a CVSS score of 8.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-58284?
Yes. A fix has been recorded for CVE-2026-58284. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-58284 affect?
CVE-2026-58284 affects Microsoft Edge (Chromium-based). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-58284?
Update Edge when patches are released; ensure auto-update is enabled.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution by an unauthenticated attacker over the network through Edge's authorization flaw.
Immediate action required
- affected>= 1.0.0.0 and < 150.0.4078.48
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.