Full Report
Microsoft Edge security advisory (AV26-740)
Analysis Summary
# Vulnerability: Microsoft Edge Stable Channel Security Updates (July 2026)
## CVE Details
- **CVE ID:** Specific CVEs not listed in the summary advisory; refers to multiple vulnerabilities addressed in the Chromium base and Edge-specific code.
- **CVSS Score:** N/A (Broadly categorized as Critical/High by typical Edge Stable Channel releases).
- **CWE:** Varies (Typically includes Use-After-Free, Out-of-bounds Write, and Type Confusion).
## Affected Systems
- **Products:** Microsoft Edge (Chromium-based)
- **Versions:** All versions prior to 150.0.4078.96
- **Configurations:** Systems running the Stable Channel of Microsoft Edge on Windows, macOS, and Linux.
## Vulnerability Description
This advisory covers security updates integrated into the Microsoft Edge Stable Channel. These updates typically include the latest security fixes from the Chromium project as well as Microsoft-specific patches. The flaws generally involve memory corruption issues within the V8 JavaScript engine, Blink rendering engine, or internal browser components that could allow for remote code execution or sandbox escapes.
## Exploitation
- **Status:** Not specified as "exploited in the wild" in this specific bulletin (Consult release notes for individual CVE statuses).
- **Complexity:** Typically Low to Medium.
- **Attack Vector:** Network (Remote). Exploitation usually requires a user to visit a specially crafted malicious webpage.
## Impact
- **Confidentiality:** High (Potential for data theft and browser history access).
- **Integrity:** High (Potential for unauthorized modification of data or system settings).
- **Availability:** High (Potential for browser crashes or system instability).
## Remediation
### Patches
- **Microsoft Edge Stable Channel:** Update to version **150.0.4078.96** or later.
### Workarounds
- No official workarounds provided. Users are strongly encouraged to apply the security update immediately as browser vulnerabilities are primary targets for web-based attacks.
## Detection
- **Indicators of compromise:** Unexpected browser crashes, unauthorized outbound network connections from the `msedge.exe` process, or unexplained changes to browser settings/extensions.
- **Detection methods:** Check the version string via "Settings -> About Microsoft Edge" or use enterprise management tools (SCCM/Intune) to audit installed browser versions.
## References
- Microsoft Edge Release Notes: hxxps[://]learn[.]microsoft[.]com/en-us/DeployEdge/microsoft-edge-relnotes-security#july-23-2026
- Cyber Centre Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/microsoft-edge-security-advisory-av26-740