Full Report
Microsoft Edge security advisory (AV26-143)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Microsoft Edge (Including Exploited Flaw CVE-2026-2441)
## CVE Details
- **CVE ID:** CVE-2026-2441 (and others addressed in the stable channel update)
- **CVSS Score:** Not explicitly provided in the advisory, but severity is treated as High/Critical due to active exploitation.
- **CWE:** Not specified in the summary.
## Affected Systems
- **Products:** Microsoft Edge (Chromium-based)
- **Versions:** All versions prior to 145.0.3800.58
- **Configurations:** Systems running the Stable Channel of Microsoft Edge.
## Vulnerability Description
The advisory details a security update for the Microsoft Edge Stable Channel. While the specific technical mechanism (e.g., memory corruption, type confusion, or use-after-free) is not detailed in the CCCS brief, it addresses multiple flaws identified in the underlying Chromium engine and Edge-specific components. The primary focus of this advisory is a fix for **CVE-2026-2441**.
## Exploitation
- **Status:** **Exploited in the wild** (Microsoft has confirmed an exploit exists for CVE-2026-2441).
- **Complexity:** Typically Low to Medium for browser-based exploits.
- **Attack Vector:** Network (Remote). Usually involves a victim visiting a specially crafted malicious webpage.
## Impact
- **Confidentiality:** High (Potential for data exfiltration or credential theft).
- **Integrity:** High (Potential for unauthorized modification of data or system settings).
- **Availability:** High (Potential for application crashes or remote code execution).
## Remediation
### Patches
- **Microsoft Edge Stable Channel:** Update to version **145.0.3800.58** or later.
### Workarounds
- No specific workarounds are provided; users are urged to apply the security update immediately due to active exploitation.
## Detection
- **Indicators of Compromise:** Monitor for unusual browser crashes or unauthorized outbound network connections from the `msedge.exe` process.
- **Detection Methods and Tools:**
- Verify the installed version of Edge via `edge://settings/help`.
- Use Vulnerability Management tools to scan for outdated `msedge.exe` binaries.
## References
- **Vendor Advisories:**
- hxxps[://]learn[.]microsoft[.]com/en-us/DeployEdge/microsoft-edge-relnotes-security#february-14-2026
- **Relevant Links:**
- hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/microsoft-edge-security-advisory-av26-143