How severe is CVE-1999-0870?

CVE-1999-0870 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-1999-0870 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0870?

CVE-1999-0870 primarily affects Microsoft Internet Explorer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0870?

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

When was CVE-1999-0870 published?

CVE-1999-0870 was published on 1998-10-01 and last updated on 2026-06-16.

CVE-1999-0870

CVE-1999-0870 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 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Explorer
Published: 1998-10-01
Last modified: 2026-06-16

Description

Internet Explorer 4.01 allows remote attackers to read arbitrary files by pasting a file name into the file upload control, aka untrusted scripted paste.

Frequently asked questions

What is CVE-1999-0870?: Internet Explorer 4.01 allows remote attackers to read arbitrary files by pasting a file name into the file upload control, aka untrusted scripted paste.
How severe is CVE-1999-0870?: CVE-1999-0870 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-1999-0870 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0870?: CVE-1999-0870 primarily affects Microsoft Internet Explorer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0870?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0870 published?: CVE-1999-0870 was published on 1998-10-01 and last updated on 2026-06-16.

References

https://docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-015

Affected products (2)

cpe:2.3:a:microsoft:internet_explorer:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:4.0.1:sp1:*:*:*:*:*:*

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