Chrome
CVE-2026-21223
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessLog in as local user
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ExploitAccess Microsoft Edge process memory
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ExecutionBypass privilege escalation protections
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ImpactRead or modify sensitive data
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V8 - Authorization Least privilege enforcement
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Local user account access on Windows system running Microsoft Edge (Chromium-based). Attacker must have valid local credentials and physical or remote access to execute local privilege operations. |
| Impact | CVSS 7.1 (HIGH). Attack vector: Local. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via local access. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Chromium-based Microsoft Edge contains a privilege management flaw that enables local authenticated users to circumvent security controls through improper access restrictions. An authorized attacker can exploit this vulnerability to gain unauthorized capabilities on the affected system, though the specific security feature being bypassed is not detailed. No patch is currently available for this high-severity issue.
Earlier versions of this analysis (1)
Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally. [CVSS 7.1 HIGH]
RemediationAI
Monitor vendor advisories for a patch.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in microsoft
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-269 (Improper Privilege Management). Affects Edge Chromium. Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.
Executive ViewAI
CVE-2026-21223 presents moderate security risk, a improper privilege management vulnerability rated CVSS 7.1. Attackers could escalate their privileges to gain elevated access beyond their authorized level. Organizations should apply vendor updates when available and consider compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Affected Products (CPE)CVE.org
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Exploit-DB