How severe is CVE-1999-1453?

CVE-1999-1453 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-1999-1453 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1453?

CVE-1999-1453 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-1453?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-1453 published?

CVE-1999-1453 was published on 1999-02-02 and last updated on 2026-06-16.

CVE-1999-1453

CVE-1999-1453 is a low-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 2.6. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Explorer
Published: 1999-02-02
Last modified: 2026-06-16

Description

Internet Explorer 4 allows remote attackers (malicious web site operators) to read the contents of the clipboard via the Internet WebBrowser ActiveX object.

Frequently asked questions

What is CVE-1999-1453?: Internet Explorer 4 allows remote attackers (malicious web site operators) to read the contents of the clipboard via the Internet WebBrowser ActiveX object.
How severe is CVE-1999-1453?: CVE-1999-1453 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-1999-1453 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1453?: CVE-1999-1453 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1453?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1453 published?: CVE-1999-1453 was published on 1999-02-02 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:internet_explorer:4.0:*:*:*:*:*:*:*

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