CVE-2026-58289: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Microsoft Edge (Chromium-based)
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-58289) in Microsoft Edge (Chromium-based) is classified as CWE-843 (Access of Resource Using Incompatible Type, or type confusion). It enables an attacker to execute arbitrary code remotely without privileges or user interaction. The CVSS 3.1 base score is 9.0, indicating critical severity, with network attack vector, high attack complexity, no privileges required, no user interaction, and complete confidentiality, integrity, and availability impact. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the system running Microsoft Edge (Chromium-based).
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-2026-58289 to remediate this vulnerability.
CVE-2026-58289: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Microsoft Edge (Chromium-based)
Description
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 9.0critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-58289) in Microsoft Edge (Chromium-based) is classified as CWE-843 (Access of Resource Using Incompatible Type, or type confusion). It enables an attacker to execute arbitrary code remotely without privileges or user interaction. The CVSS 3.1 base score is 9.0, indicating critical severity, with network attack vector, high attack complexity, no privileges required, no user interaction, and complete confidentiality, integrity, and availability impact. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the system running Microsoft Edge (Chromium-based).
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-2026-58289 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-2026-58289","vendor":"Microsoft"}]
Threat ID: 6a48210527e9c79719accc61
Added to database: 07/03/2026, 20:52:21 UTC
Last enriched: 07/03/2026, 21:06:40 UTC
Last updated: 07/03/2026, 22:52:01 UTC
Views: 3
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