CVE-2007-1751: Internet Explorer uninitialized memory corruption allows remote code execution

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 19 September 2026. Confidence: high.

high priorityRemote code execution with complete confidentiality, integrity, and availability impact and a very high EPSS score, though exploitation requires user interaction and the product is legacy.

What it is

Microsoft Internet Explorer 5.01, 6, and 7 can be made to access an uninitialized or deleted object related to prototype variables and table cells, corrupting memory. A remote attacker who gets a victim to load crafted content can turn this into arbitrary code execution in the browser's context.

Impact

An attacker gains the ability to execute arbitrary code with the privileges of the logged-on user, which typically means full control of the workstation if the user is an administrator. This enables malware installation, data theft, or further lateral movement.

Attack surface

Reached over the network via a crafted web page or HTML document rendered by Internet Explorer; no authentication is required, but the victim must be lured into viewing the malicious content (user interaction). The CVSS vector AV:N/AC:M/Au:N confirms network reachability with medium complexity and no auth.

Exploitation

Not listed in CISA KEV and no ransomware associations are recorded, but EPSS is 0.60841 (99.1st percentile), indicating a high modeled likelihood of exploitation activity. Reference tags show only vendor, third-party, and patch advisories, with no public exploit tag in the record.

What to do

• Apply Microsoft security bulletin MS07-033, which is the vendor patch for this issue, to all affected Internet Explorer versions.
• Upgrade or migrate off Internet Explorer 5.01, 6, and 7 to a supported browser, since these versions are long end-of-life.
• Enforce least privilege so users do not browse as local administrators, limiting the impact of successful code execution.
• Block or restrict access to untrusted web content and use network controls to reduce exposure to malicious pages.

Detection

• Monitor for Internet Explorer crashes or unexpected process terminations that could indicate memory corruption attempts.
• Hunt for child processes spawned by iexplore.exe, such as cmd.exe, powershell.exe, or script hosts, which are abnormal for normal browsing.
• Review proxy and DNS logs for connections to known malicious or newly registered domains serving exploit pages to IE user agents.
• Use the OVAL definition referenced in the record to check endpoint patch state for MS07-033.

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