VDB-13828 · CVE-1999-0535 · XFDB 223

Microsoft Windows NT 4.0/2000 Account Policy 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.
9.2	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft Windows NT 4.0/2000. Affected by this issue is some unknown functionality of the component Account Policy. Executing a manipulation can lead to privileges management. This vulnerability appears as CVE-1999-0535. In addition, an exploit is available. Configuration settings should be changed.

Detailsinfo

A vulnerability has been found in Microsoft Windows NT 4.0/2000 (Operating System) and classified as very critical. This vulnerability affects an unknown part of the component Account Policy. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A Windows NT account policy for passwords has inappropriate, security-critical settings, e.g. for password length, password age, or uniqueness.

The weakness was presented 01/01/1997. This vulnerability was named CVE-1999-0535. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/16/2026). The MITRE ATT&CK project declares the attack technique as T1068.

It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k.

It is possible to mitigate the problem by applying the configuration setting .

The vulnerability is also documented in the databases at X-Force (223) and Vulnerability Center (SBV-1010†). See VDB-13832, VDB-13831, VDB-13830 and VDB-13827 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Microsoft

Name

Windows

Version

License

commercial

Website

Vendor: https://www.microsoft.com/
Product: https://www.microsoft.com/en-us/windows

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.2

VulDB Base Score: 9.8
VulDB Temp Score: 9.2
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: 🔍
Access: Public
Status: Highly functional

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: Config
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/01/1997 🔍
01/01/1997 +0 days 🔍
07/21/1999 +931 days 🔍
02/24/2003 +1314 days 🔍
06/17/2014 +4131 days 🔍
04/16/2026 +4321 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Status: Not defined

CVE: CVE-1999-0535 (🔍)
GCVE (CVE): GCVE-0-1999-0535
GCVE (VulDB): GCVE-100-13828
X-Force: 223
Vulnerability Center: 1010 - Windows 2000/NT Maximum Password Age Exceeds Policy, Info

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/18/2014 00:26
Updated: 04/16/2026 13:24
Changes: 06/18/2014 00:26 (41), 05/09/2019 17:24 (16), 04/16/2026 13:24 (21)
Complete: 🔍
Cache ID: 216::103