CVE-2026-70339: 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 involves type confusion in Microsoft Edge (Chromium-based), enabling an attacker to execute code remotely by exploiting access of a resource using an incompatible type. The flaw is identified as CWE-843 and affects version 1.0.0.0 of the product. Microsoft has published an official fix to remediate this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation could allow an unauthorized attacker to execute code remotely on a victim's system via the network. The impact is limited to confidentiality and integrity with no direct availability impact. The vulnerability requires no privileges and user interaction is required.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70339 to remediate this vulnerability.
CVE-2026-70339: 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 5.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves type confusion in Microsoft Edge (Chromium-based), enabling an attacker to execute code remotely by exploiting access of a resource using an incompatible type. The flaw is identified as CWE-843 and affects version 1.0.0.0 of the product. Microsoft has published an official fix to remediate this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation could allow an unauthorized attacker to execute code remotely on a victim's system via the network. The impact is limited to confidentiality and integrity with no direct availability impact. The vulnerability requires no privileges and user interaction is required.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70339 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T00:04:56.037Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70339","vendor":"Microsoft"}]
Threat ID: 6a7b779fbf8831d5394b3fff
Added to database: 08/11/2026, 19:27:27 UTC
Last enriched: 08/11/2026, 19:43:43 UTC
Last updated: 08/12/2026, 02:12:57 UTC
Views: 5
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