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CVE-2026-70341: use-after-free vulnerability

CVE-2026-70341 currently carries a HIGH 8 5 severity signal in the retained vulnerability data. Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

NIST NVD•Sep 12, 2026, 4:16 AM UTC•3 min read•CVE-2026-70341
IN 30 SECONDS

What you need to know

What happenedSource reporting

CVE-2026-70341 currently carries a HIGH 8 5 severity signal in the retained vulnerability data. Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network. The flaw is described as a use-after-free vulnerability. A use-after-free flaw is a memory-safety problem in which software continues using memory after it has already been released. The flaw is classified as an use-after-free. A use-after-free happens when software continues working with memory after that memory should already have been released.

Who is affectedSource reporting

Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

Exploitation statusCDF assessment

No active exploitation was identified in the current reporting reviewed.

Why it mattersSource reporting

No exploitation flag is present in the retained CyberDeltaForce data at this time; that status can change as vendor and threat-intelligence reporting develops.

What to do nowCDF guidance

Inventory the affected product deployments and confirm whether the affected component and vulnerable release are present.

THE NEWS

What happened

Verified reporting in clear, practical language.

CVE-2026-70341 currently carries a HIGH 8 5 severity signal in the retained vulnerability data. Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network. The flaw is described as a use-after-free vulnerability.

A use-after-free flaw is a memory-safety problem in which software continues using memory after it has already been released. The flaw is classified as an use-after-free. A use-after-free happens when software continues working with memory after that memory should already have been released.

REFERENCES

Reference sources

NIST NVD
CYBERDELTAFORCE INTELLIGENCE

Reporting ends here. The sections below are CyberDeltaForce analysis and defender-focused interpretation.

DEFENDER ACTIONS

What security teams should do now

  • Inventory the affected product deployments and confirm whether the affected component and vulnerable release are present.
  • Apply the vendor patch or mitigation for CVE-2026-70341 and validate the affected path after remediation.
OPEN QUESTIONS

What is not yet confirmed

  • So far, researchers have not reported exploitation, but that can change as vendor, government or threat-intelligence reporting develops.
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