Chromium-based Microsoft Edge is widely deployed; an RCE in a major browser risks mass exploitation and enterprise compromise.
CVE-2026-70341
Use-after-free in Microsoft Edge allows remote code execution.
Is CVE-2026-70341 being exploited?
Not confirmed. CVE-2026-70341 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 0.62% probability of exploitation in the next 30 days.
How severe is CVE-2026-70341?
CVE-2026-70341 is rated High with a CVSS score of 8.5. 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-2026-70341?
Yes. A fix has been recorded for CVE-2026-70341. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-70341 affect?
CVE-2026-70341 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-2026-70341?
Install Microsoft Edge security updates immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via use-after-free in Edge; attacker can execute arbitrary code remotely and potentially compromise user session or host.
Patch when possible
- affected>= 1.0.0.0 and < 152.0.4191.52
- affected>= 1.0.0.0 and < 152.0.4191.52
- affected>= 1.0.0.0 and < 152.0.4191.52
- affected>= 1.0.0 and < 152.0.4191.52
- affected>= 1.0.0.0 and < 152.0.4191.52
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.