Remote Code Execution in Microsoft Internet Explorer Scripting Engine (CVE‑2019‑1367)
What It Is — Microsoft Internet Explorer’s scripting engine contains a memory‑corruption flaw that can be triggered by specially‑crafted web content. The bug allows an attacker to execute arbitrary code in the context of the current user.
Exploitability — The vulnerability is rated High (CVSS v3.1 ≈ 7.8). Public proof‑of‑concept code exists and the vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild.
Affected Products — All supported versions of Microsoft Internet Explorer on Windows 7, 8.1, and 10 that retain the legacy scripting engine.
Why It Matters for Trust & Control Assurance
- Demonstrates the need for continuous patch management and evidence that critical browsers are kept up‑to‑date.
- Highlights the importance of asset inventory and de‑commissioning legacy software that no longer receives security updates.
- Provides a concrete test case for the control objective “Maintain a documented process for timely remediation of known vulnerabilities”, which maps to many frameworks (e.g., NIST CSF 2.0, ISO 27001).
Recommended Actions
- Apply Microsoft’s security update for CVE‑2019‑1367 immediately.
- If IE is not required, disable or uninstall the browser to reduce attack surface.
- Verify that your endpoint management system records the patch status as evidence of remediation.
- Update your vulnerability‑remediation workflow to include this CVE and capture audit‑ready logs.
- Monitor external threat feeds for any exploitation attempts targeting IE.
Source: CISA KEV – CVE‑2019‑1367