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Fencer Vulns
medium 5.1

CVE-1999-1093 json

Buffer overflow in the Window.External function in the JScript Scripting Engine in Internet Explorer 4.01 SP1 and earlier allows remote att…

published 1999-12-31 26 y ago modified 2026-06-16 4 mo ago also EUVD-1999-1074

cvss
5.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
12.8%
EPSS 12.8% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

Buffer overflow in the Window.External function in the JScript Scripting Engine in Internet Explorer 4.01 SP1 and earlier allows remote attackers to execute arbitrary commands via a malicious web page.

Exploit prediction

12.79% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.