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CVE-2019-1030: Microsoft Edge based on Edge HTML Information Disclosure Vulnerability

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-14 · updated 2026-06-17
• Weakness: CWE-200

Description

An information disclosure vulnerability exists when Microsoft Edge based on Edge HTML improperly handles objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system. To exploit the vulnerability, in a web-based attack scenario, an attacker could host a website in an attempt to exploit the vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit the vulnerability. However, in all cases an attacker would have no way to force a user to view the attacker-controlled content. Instead, an attacker would have to convince a user to take action. For example, an attacker could trick a user into clicking a link that takes the user to the attacker's site. The update addresses the vulnerability by modifying how Microsoft Edge based on Edge HTML handles objects in memory.

Affected products

• Microsoft Edge: all versions
• Microsoft Edge: from 1.0..0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft Edge publication. Check the vendor advisory for mitigations.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1030
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1030

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