CVE-2019-0768: Internet Explorer VBScript policy security feature bypass

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 20 September 2026. Confidence: medium.

medium priorityCVSS is only 4.3 and the flaw is a policy bypass requiring user interaction, but the high EPSS percentile and unpatched IE deployments keep it worth tracking.

What it is

Internet Explorer's VBScript execution policy fails to properly restrict VBScript under specific conditions, allowing requests that should be ignored. This is a security feature bypass that weakens a defense-in-depth control rather than granting direct code execution.

Impact

An attacker can bypass the VBScript execution policy, potentially enabling script content that the policy was meant to block. The CVSS vector shows only low confidentiality impact, so the direct gain is limited.

Attack surface

Reachable over the network (AV:N) with no privileges required (PR:N), but exploitation requires user interaction (UI:R), typically a victim visiting a crafted page or opening crafted content in Internet Explorer.

Exploitation

Not listed in CISA KEV and no public exploit references are provided; EPSS is high at 0.485 (98.8th percentile), indicating elevated predicted exploitation activity despite the absence of confirmed in-the-wild use.

What to do

• Apply the Microsoft security update referenced in the vendor advisory.
• Disable or restrict VBScript execution in Internet Explorer via policy where business needs allow.
• Migrate users off Internet Explorer to a supported browser.
• Block or warn on untrusted web content and enforce Protected Mode/Enhanced Security Configuration.
• Monitor for unexpected VBScript execution in browser processes.

Detection

• Alert on Internet Explorer processes (iexplore.exe) spawning script hosts or executing VBScript unexpectedly.
• Review proxy and web logs for access to pages delivering VBScript content to IE clients.
• Audit endpoint policy settings for VBScript execution restrictions and flag deviations.
• Correlate IE crash or script-error telemetry with suspicious browsing activity.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.