How severe is CVE-1999-0489?

CVE-1999-0489 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-0489 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0489?

CVE-1999-0489 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0489?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-1999-0489 published?

CVE-1999-0489 was published on 1999-05-17 and last updated on 2026-06-16.

CVE-1999-0489

CVE-1999-0489 is a critical-severity vulnerability in Microsoft Windows Nt with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows Nt
Published: 1999-05-17
Last modified: 2026-06-16

Description

MSHTML.DLL in Internet Explorer 5.0 allows a remote attacker to paste a file name into the file upload intrinsic control, a variant of "untrusted scripted paste" as described in MS:MS98-013.

Frequently asked questions

What is CVE-1999-0489?: MSHTML.DLL in Internet Explorer 5.0 allows a remote attacker to paste a file name into the file upload intrinsic control, a variant of "untrusted scripted paste" as described in MS:MS98-013.
How severe is CVE-1999-0489?: CVE-1999-0489 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-0489 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0489?: CVE-1999-0489 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0489?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-1999-0489 published?: CVE-1999-0489 was published on 1999-05-17 and last updated on 2026-06-16.

References

https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-015

Affected products (1)

cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

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