CVE-2026-58299: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Microsoft Edge (Chromium-based)
CVE-2026-58299 is a time-of-check to time-of-use (TOCTOU) race condition vulnerability in Microsoft Edge (Chromium-based) for Android. This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity rating with a CVSS score of 7.5. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability involves a TOCTOU race condition in Microsoft Edge for Android, which could be exploited by an attacker to execute arbitrary code remotely. The CVSS v3.1 score is 7.5, indicating high severity with network attack vector, high impact on confidentiality, integrity, and availability, and requiring user interaction with high attack complexity. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to execute arbitrary code remotely on the affected device, potentially leading to full compromise of confidentiality, integrity, and availability of the system running Microsoft Edge for Android.
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-2026-58299 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
CVE-2026-58299 is a time-of-check to time-of-use (TOCTOU) race condition vulnerability in Microsoft Edge (Chromium-based) for Android. This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity rating with a CVSS score of 7.5. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 7.5high
Affected software
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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, which could be exploited by an attacker to execute arbitrary code remotely. The CVSS v3.1 score is 7.5, indicating high severity with network attack vector, high impact on confidentiality, integrity, and availability, and requiring user interaction with high attack complexity. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to execute arbitrary code remotely on the affected device, potentially leading to full compromise of confidentiality, integrity, and availability of the system running Microsoft Edge for Android.
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-2026-58299 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: 07/03/2026, 21:07:48 UTC
Last updated: 07/03/2026, 21:11:21 UTC
Views: 3
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