VDB-13865 · CVE-1999-1128 · GCVE-0-1999-1128

Microsoft Internet Explorer 3.01 ISP File privileges management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Microsoft Internet Explorer 3.01. It has been classified as critical. Impacted is an unknown function of the component ISP File Handler. The manipulation leads to privileges management. This vulnerability is referenced as CVE-1999-1128. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Microsoft Internet Explorer 3.01 (Web Browser) and classified as critical. This issue affects an unknown code block of the component ISP File Handler. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Internet Explorer 3.01 on Windows 95 allows remote malicious web sites to execute arbitrary commands via a .isp file, which is automatically downloaded and executed without prompting the user.

The issue has been introduced in 10/01/1996. The weakness was published 03/01/1997 (Website). The advisory is shared at members.tripod.com. The identification of this vulnerability is CVE-1999-1128. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 151 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 4.0, 5.0, 5.5 or 6.0 eliminates this vulnerability.

oliver.efri.hr is providing further details. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Web Browser

Vendor

Microsoft

Name

Internet Explorer

Version

3.01

License

commercial

Support

end of life

Website

Vendor: https://www.microsoft.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Internet Explorer 4.0/5.0/5.5/6.0

Timelineinfo

10/01/1996 🔍
03/01/1997 +151 days 🔍
03/01/1997 +0 days 🔍
06/17/2014 +6317 days 🔍
04/16/2026 +4321 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: members.tripod.com
Status: Confirmed

CVE: CVE-1999-1128 (🔍)
GCVE (CVE): GCVE-0-1999-1128
GCVE (VulDB): GCVE-100-13865
Misc.: 🔍

Entryinfo

Created: 06/18/2014 01:03
Updated: 04/16/2026 17:41
Changes: 06/18/2014 01:03 (42), 04/07/2017 12:05 (10), 04/16/2026 17:41 (18)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.