CVE-2026-58299: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Microsoft Edge (Chromium-based)
Time-of-check time-of-use (toctou) race condition in Microsoft Edge for Android allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability involves a TOCTOU race condition in Microsoft Edge for Android, identified as CWE-367. It allows an attacker to execute code remotely by exploiting the timing between checking a condition and using a resource. The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, high complexity, no privileges required, and user interaction needed. 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. The attacker does not require privileges but needs user interaction. The vulnerability is exploitable over a network.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58299 to remediate this vulnerability.
CVE-2026-58299: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Microsoft Edge (Chromium-based)
Description
Time-of-check time-of-use (toctou) race condition in Microsoft Edge for Android allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Microsoft Edge (Chromium-based)
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a TOCTOU race condition in Microsoft Edge for Android, identified as CWE-367. It allows an attacker to execute code remotely by exploiting the timing between checking a condition and using a resource. The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, high complexity, no privileges required, and user interaction needed. 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. The attacker does not require privileges but needs user interaction. The vulnerability is exploitable over a network.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58299 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-2026-58299","vendor":"Microsoft"}]
Threat ID: 6a48210727e9c79719accdbf
Added to database: 07/03/2026, 20:52:23 UTC
Last enriched: 08/17/2026, 14:13:59 UTC
Last updated: 10/01/2026, 15:01:30 UTC
Views: 153
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