CVE-2026-66311: CWE-862: Missing Authorization in Microsoft Microsoft Edge (Chromium-based)
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-862 (Missing Authorization), exists in Microsoft Edge (Chromium-based) version 1.0.0.0. It allows an unauthorized local attacker to perform tampering actions due to missing authorization checks. The CVSS v3.1 base score is 6.2, reflecting a medium severity with high confidentiality impact but no impact on integrity or availability. Microsoft has published an official fix for this issue.
Potential Impact
An unauthorized local attacker can exploit this vulnerability to perform tampering actions, potentially compromising confidentiality. There is no reported impact on integrity or availability. No known exploits are currently in the wild.
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-2026-66311 to remediate this vulnerability.
CVE-2026-66311: CWE-862: Missing Authorization in Microsoft Microsoft Edge (Chromium-based)
Description
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.
CVSS v3.1
Score 6.2medium
Affected software
Microsoft
Microsoft Edge (Chromium-based)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-862 (Missing Authorization), exists in Microsoft Edge (Chromium-based) version 1.0.0.0. It allows an unauthorized local attacker to perform tampering actions due to missing authorization checks. The CVSS v3.1 base score is 6.2, reflecting a medium severity with high confidentiality impact but no impact on integrity or availability. Microsoft has published an official fix for this issue.
Potential Impact
An unauthorized local attacker can exploit this vulnerability to perform tampering actions, potentially compromising confidentiality. There is no reported impact on integrity or availability. No known exploits are currently in the wild.
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-2026-66311 to remediate this vulnerability.
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: 08/11/2026, 14:56:57 UTC
Last updated: 09/18/2026, 01:04:25 UTC
Views: 40
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