TI-1999-01036 Aliases CVE-1999-1087 GHSA-9rv3-rxw8-xr7c

Internet Explorer 4 treats a 32-bit number ("dotless IP address") in the a URL as the…

MEDIUM 42Published 2002-03-09 · Updated 2024-08-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Partial · Partial · Partial
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

Internet Explorer 4 treats a 32-bit number ("dotless IP address") in the a URL as the hostname instead of an IP address, which causes IE to apply Local Intranet Zone settings to the resulting web page, allowing remote malicious web servers to conduct unauthorized activities by using URLs that contain the dotless IP address for their server.

Why it matters now

EPSS 0.06401 93rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:internet_explorer:4.0:::::::*	4.0	Vulnerable	Microsoft
cpe:2.3:a:microsoft:internet_explorer:4.0.1:::::::*	4.0.1	Vulnerable	Microsoft
cpe:2.3:a:microsoft:internet_explorer:4.0.1:sp1::::::	4.0.1 sp1	Vulnerable	Microsoft

cpe:2.3:a:microsoft:internet_explorer:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Microsoft
cpe:2.3:a:microsoft:internet_explorer:4.0.1:*:*:*:*:*:*:* Versions 4.0.1 Vulnerable ·Microsoft
cpe:2.3:a:microsoft:internet_explorer:4.0.1:sp1:*:*:*:*:*:* Versions 4.0.1 sp1 Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-1999-1087
2026-10-03 Alias added: GHSA-9rv3-rxw8-xr7c

References

Patch 1

Q168617

Advisory 1

MS98-016

Other 2

TI-2015-00277 Use-after-free vulnerability in Adobe Flash Player before 13.0.0.269 and 14.x through… KEVCVSS 3.1CRITICAL 9.8
TI-2015-00275 Unspecified vulnerability in Adobe Flash Player through 13.0.0.262 and 14.x, 15.x, and… KEVCVSS 3.1CRITICAL 9.8
TI-2014-01386 Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote… KEVCVSS 3.1CRITICAL 9.8
TI-2020-01340 Scripting Engine Memory Corruption Vulnerability KEVCVSS 3.1HIGH 8.8
TI-2019-00335 Command injection in Microsoft Office KEVCVSS 3.1HIGH 8.8
TI-2017-00204 Out-of-bounds write in Microsoft Internet Explorer KEVCVSS 3.1HIGH 8.8

See all 1634 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences