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Vulnerability record · CVE-1999-1094 · published 31 December 1999

CVE-1999-1094: Microsoft internet explorer vulnerability

Microsoft · Internet Explorer

Buffer overflow in Internet Explorer 4.01 and earlier allows remote attackers to execute arbitrary commands via a long URL with the "mk:" protocol, aka the "MK Overrun security issue."

7.5 CVSS 2.0 High EPSS 18% · top 2.9%
7.5CVSS 2.0 base score
18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

Buffer overflow in Internet Explorer 4.01 and earlier allows remote attackers to execute arbitrary commands via a long URL with the "mk:" protocol, aka the "MK Overrun security issue."

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=88480839506155&w=2
http://support.microsoft.com/support/kb/articles/q176/6/97.asp PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/917
http://marc.info/?l=bugtraq&m=88480839506155&w=2
http://support.microsoft.com/support/kb/articles/q176/6/97.asp PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/917

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-1999-1094), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.