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7.5
CVE-1999-0488: Internet Explorer 4/5 can run malicious scripts from URLs
CVE-1999-0488 · published 27 years ago
Summary
Internet Explorer versions 4.0 and 5.0 may let a remote attacker cause the browser to execute harmful code by using specially crafted web links. This can let the attacker act with the same privileges as the user, potentially stealing data or taking control of the system. Update to a newer browser or apply any available security patches to protect against this risk.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | internet_explorer |
4.0 4.0.1 5.0 cpe:2.3:a:microsoft:internet_explorer:4.0:*:*:*:*:*:*:* |
Original advisory text
Internet Explorer 4.0 and 5.0 allows a remote attacker to execute security scripts in a different security context using malicious URLs, a variant of the "cross frame" vulnerability.
Internet Explorer 4.0 and 5.0 allows a remote attacker to execute security scripts in a different security context using malicious URLs, a variant of the "cross frame" vulnerability.
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker partial control (estimated)
Severity
7.5
High
Timeline
Published21 Apr 1999
Updated19 Oct 2026
First seen29 Sep 2026
Sources
CVE-1999-0488 · NVD
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