CVE-2026-83831: Double free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Routine

HIGH 8.8WATCHLIST

CVE-2026-83831 is a high-severity flaw (CVSS 8.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Double free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Why this priority

High severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-415
Published	2026-10-27
Last modified	2026-10-27

Publisher (CNA): Microsoft Corporation

Last updated 2026-10-27 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-27 21:19 UTCPublished CVE record published
2026-10-27 21:31 UTCUpdated Record last modified

Advisories and coverage

Official advisories

Microsoft MSRC Update Guide: CVE-2026-83831 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability 2026-10-16

Research and news

Vulners Bulletins: CVE-2026-83831 2026-10-27

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-83831?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-83831 being exploited?

CVE-2026-83831 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-83831 affect?

CVE-2026-83831 affects affected software. Severity is high (CVSS 8.8). Double free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

How urgent is CVE-2026-83831?

Priority 36/100. High severity; On your watchlist

Software pages

Microsoft Edge vulnerabilities · Chromium vulnerabilities

References

← Back to latest CVEs