CVE-2026-58294: 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 CVE-2026-58294 and classified under CWE-416 (Use After Free), affects Microsoft Edge (Chromium-based). It enables an attacker without privileges to execute arbitrary code remotely by exploiting a use-after-free condition. The vulnerability is rated high severity with a CVSS 3.1 base score of 7.5, indicating network attack vector with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this use-after-free vulnerability could allow an unauthorized attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The impact includes high confidentiality, integrity, and availability loss as indicated by the CVSS vector.
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-2026-58294 to remediate this vulnerability.
CVE-2026-58294: 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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-58294 and classified under CWE-416 (Use After Free), affects Microsoft Edge (Chromium-based). It enables an attacker without privileges to execute arbitrary code remotely by exploiting a use-after-free condition. The vulnerability is rated high severity with a CVSS 3.1 base score of 7.5, indicating network attack vector with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this use-after-free vulnerability could allow an unauthorized attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The impact includes high confidentiality, integrity, and availability loss as indicated by the CVSS vector.
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-2026-58294 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-29T21:59:30.871Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58294","vendor":"Microsoft"}]
Threat ID: 6a48210527e9c79719accc77
Added to database: 07/03/2026, 20:52:21 UTC
Last enriched: 07/03/2026, 21:07:15 UTC
Last updated: 07/04/2026, 01:14:22 UTC
Views: 5
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