CVE-2026-66311: CWE-862: Missing Authorization in Microsoft Microsoft Edge (Chromium-based)
CVE-2026-66311 is a medium severity vulnerability in Microsoft Edge (Chromium-based) version 1.0.0.0 caused by missing authorization. This flaw allows an unauthorized local attacker to perform tampering actions. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-66311) in Microsoft Edge (Chromium-based) version 1.0.0.0 is due to missing authorization controls (CWE-862), enabling an unauthorized attacker with local access to tamper with the application. The CVSS v3.1 base score is 6.2, reflecting medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
An attacker with local access can exploit the missing authorization to perform unauthorized tampering within Microsoft Edge (Chromium-based) version 1.0.0.0. The confidentiality of data can be compromised, but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
Apply the official security update provided by Microsoft for Microsoft Edge (Chromium-based) version 1.0.0.0 as soon as possible to remediate this missing authorization vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66311 for detailed patch information and installation instructions.
CVE-2026-66311: CWE-862: Missing Authorization in Microsoft Microsoft Edge (Chromium-based)
Description
CVE-2026-66311 is a medium severity vulnerability in Microsoft Edge (Chromium-based) version 1.0.0.0 caused by missing authorization. This flaw allows an unauthorized local attacker to perform tampering actions. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 6.2medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-66311) in Microsoft Edge (Chromium-based) version 1.0.0.0 is due to missing authorization controls (CWE-862), enabling an unauthorized attacker with local access to tamper with the application. The CVSS v3.1 base score is 6.2, reflecting medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
An attacker with local access can exploit the missing authorization to perform unauthorized tampering within Microsoft Edge (Chromium-based) version 1.0.0.0. The confidentiality of data can be compromised, but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
Apply the official security update provided by Microsoft for Microsoft Edge (Chromium-based) version 1.0.0.0 as soon as possible to remediate this missing authorization vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66311 for detailed patch information and installation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-24T18:06:51.295Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66311","vendor":"Microsoft"}]
Threat ID: 6a7121fcbf32cb7a3462c058
Added to database: 08/03/2026, 23:19:24 UTC
Last enriched: 08/03/2026, 23:34:20 UTC
Last updated: 08/04/2026, 02:04:49 UTC
Views: 5
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