Microsoft Edge is a widely deployed browser; a remote code execution in a mainstream browser can affect many organizations and attract broad attention.
CVE-2026-85898
Edge (Chromium) type-confusion RCE allowing remote code execution
Is CVE-2026-85898 being exploited?
Not confirmed. CVE-2026-85898 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.
How severe is CVE-2026-85898?
CVE-2026-85898 is rated High with a CVSS score of 8.8. 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-2026-85898?
Yes. A fix has been recorded for CVE-2026-85898. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-85898 affect?
CVE-2026-85898 affects Microsoft Edge (Chromium-based), Windows endpoints running Edge. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-85898?
Apply Microsoft's Edge security update immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via crafted web content; attacker can execute arbitrary code as the user, steal data, or pivot from the browser.
Immediate action required
- affected>= 1.0.0.0 and < 154.0.4258.48
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.