CVE-2026-66315: CWE-416: Use After Free in Microsoft Microsoft Edge (Chromium-based)
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-416 (Use After Free), affects Microsoft Edge (Chromium-based). It allows remote code execution by an unauthorized attacker exploiting a use-after-free condition. The CVSS v3.1 vector indicates network attack vector, high attack complexity, no privileges required, user interaction required, and impacts confidentiality, integrity, and availability with high severity. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation can lead to remote code execution with high impact on confidentiality, integrity, and availability of the affected system. This could allow attackers to run arbitrary code remotely without privileges, potentially compromising the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66315 to remediate this vulnerability.
CVE-2026-66315: CWE-416: Use After Free in Microsoft Microsoft Edge (Chromium-based)
Description
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Microsoft Edge (Chromium-based)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-416 (Use After Free), affects Microsoft Edge (Chromium-based). It allows remote code execution by an unauthorized attacker exploiting a use-after-free condition. The CVSS v3.1 vector indicates network attack vector, high attack complexity, no privileges required, user interaction required, and impacts confidentiality, integrity, and availability with high severity. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation can lead to remote code execution with high impact on confidentiality, integrity, and availability of the affected system. This could allow attackers to run arbitrary code remotely without privileges, potentially compromising the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66315 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-24T18:06:51.295Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66315","vendor":"Microsoft"}]
Threat ID: 6a7121fcbf32cb7a3462c064
Added to database: 08/03/2026, 23:19:24 UTC
Last enriched: 08/11/2026, 14:59:59 UTC
Last updated: 09/18/2026, 01:04:25 UTC
Views: 48
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