Full Report
Microsoft Edge security advisory (AV26-362)
Analysis Summary
# Vulnerability: Microsoft Edge Stable Channel Security Update (April 2026)
## CVE Details
*Note: The specific CVE identifiers were not enumerated in the source advisory provided, as it serves as a high-level notification for a rollup update.*
- **CVE ID:** Multiple (Refer to Microsoft Release Notes for specific IDs)
- **CVSS Score:** Variable (Typically High to Critical for browser updates)
- **CWE:** Commonly includes Use-After-Free, Heap Buffer Overflow, or Type Confusion (typical of Chromium-based updates).
## Affected Systems
- **Products:** Microsoft Edge (Chromium-based)
- **Versions:** All versions prior to 147.0.3912.72
- **Configurations:** Systems running the Stable Channel of Microsoft Edge on Windows, macOS, and Linux.
## Vulnerability Description
This advisory refers to a security rollup for Microsoft Edge. While specific technical details for each flaw are maintained in the Chromium project and Microsoft Security Response Center (MSRC) databases, these updates generally address memory corruption issues, sandbox escapes, or remote code execution (RCE) vulnerabilities inherent in the browser engine.
## Exploitation
- **Status:** Unknown (Refer to Microsoft’s specific CVE entries for "Exploited in the Wild" flags).
- **Complexity:** Typically Low to Medium.
- **Attack Vector:** Network (Remote). Most Edge vulnerabilities are triggered by a user visiting a specially crafted malicious webpage.
## Impact
- **Confidentiality:** High (Potential for data exfiltration)
- **Integrity:** High (Potential for unauthorized modification of data)
- **Availability:** High (Potential for browser crashing or system instability)
## Remediation
### Patches
Microsoft recommends updating to the following version or later:
- **Microsoft Edge Stable Channel:** 147.0.3912.72
Users can manually trigger the update by navigating to `edge://settings/help` in the browser.
### Workarounds
- No specific workarounds are provided. Standard best practices include avoiding untrusted websites and applying the principle of least privilege for browser users.
## Detection
- **Indicators of Compromise:** Monitor for unusual outbound network traffic or unexpected browser process crashes.
- **Detection methods and tools:** Hardware and software inventory tools can be used to scan for outdated versions of `msedge.exe`. Most Vulnerability Management (VM) scanners will flag versions below 147.0.3912.72 as vulnerable.
## References
- Microsoft Edge Stable Channel Release Notes: hxxps[://]learn[.]microsoft[.]com/en-us/DeployEdge/microsoft-edge-relnotes-security#april-16-2026
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/microsoft-edge-security-advisory-av26-362