CVE-2026-66798: CWE-416: Use After Free in Microsoft Microsoft Edge (Chromium-based)
Description
CVE-2026-66798 is a use-after-free vulnerability in Microsoft Edge (Chromium-based) version 1.0.0.0. This flaw could allow an unauthorized attacker to execute code remotely over a network. The vulnerability has a medium severity score of 4.3. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-66798 is a use-after-free vulnerability (CWE-416) affecting Microsoft Edge (Chromium-based) version 1.0.0.0. This vulnerability could be exploited by an attacker over a network to execute code without requiring privileges but with user interaction. The CVSS 3.1 base score is 4.3, indicating medium severity. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker could exploit this use-after-free vulnerability remotely to execute code, potentially impacting system availability. The vulnerability does not impact confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the provided patch to Microsoft Edge (Chromium-based) version 1.0.0.0 to remediate the issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-c27v-65fh-7pg2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-66798"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- Remediation Level
- official-fix
- State
- PUBLISHED
Threat ID: 6a92f7f2acd9273b49e7e284
Added to database: 08/29/2026, 15:17:06 UTC
Last enriched: 10/08/2026, 22:45:09 UTC
Last updated: 10/11/2026, 18:48:21 UTC
Views: 44
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