CVE-2007-2999 — Microsoft Windows Server 2003, when time restrictions are in effect for user accounts, generates different error messages for failed login attempts with a valid user name than for those with an invalid user name, which allows context-dependent attackers to determine valid Active Directory account names

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LOW

Microsoft Windows Server 2003, when time restrictions are in effect for user accounts, generates different error messages for failed login attempts with a valid user name than for those with an invalid user name, which allows context-dependent attackers to determine valid Active Directory account names

Published Jun 4, 2007

1.8

LOW

CVSS 2.0

EPSS 1.64%

Description

Microsoft Windows Server 2003, when time restrictions are in effect for user accounts, generates different error messages for failed login attempts with a valid user name than for those with an invalid user name, which allows context-dependent attackers to determine valid Active Directory account names.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.64% 0.01641

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01641

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (13 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.64% (0.01641)	75.52th	v5 (v2026.06.15)
Jun 15, 2026	1.64% (0.01641)	73.22th	v5 (v2026.06.15)
Mar 17, 2025	0.68% (0.00682)	69.94th	v4 (v2025.03.14)
Dec 12, 2024	0.27% (0.00272)	68.81th	v3 (v2023.03.01)
Apr 7, 2024	0.26% (0.00255)	64.86th	v3 (v2023.03.01)
Jan 22, 2024	0.24% (0.00245)	62.48th	v3 (v2023.03.01)
Nov 6, 2023	0.24% (0.00240)	61.86th	v3 (v2023.03.01)
Sep 29, 2023	0.22% (0.00216)	59.11th	v3 (v2023.03.01)
Aug 24, 2023	0.19% (0.00195)	56.58th	v3 (v2023.03.01)
Mar 7, 2023	0.14% (0.00140)	47.93th	v3 (v2023.03.01)
Mar 6, 2023	6.12% (0.06118)	90.60th	v2 (v2022.01.01)
Apr 1, 2022	6.12% (0.06118)	89.73th	v2 (v2022.01.01)
Feb 4, 2022	6.12% (0.06118)	77.57th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (4)

http://osvdb.org/36138
vdb-entryx_refsource_OSVDB
http://secunia.com/advisories/25457
third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://www.notsosecure.com/folder2/2007/05/27/logon-time-restrictions-in-a-domain-in-windows-server-2003-allows-username-enumeration/
x_refsource_MISC
http://www.securityfocus.com/bid/24248
vdb-entryx_refsource_BID

Link	Providers	Tags
http://osvdb.org/36138		vdb-entryx_refsource_OSVDB
http://secunia.com/advisories/25457		third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://www.notsosecure.com/folder2/2007/05/27/logon-time-restrictions-in-a-domain-in-windows-server-2003-allows-username-enumeration/		x_refsource_MISC
http://www.securityfocus.com/bid/24248		vdb-entryx_refsource_BID

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jun 4, 2007

Updated Aug 7, 2024

Reserved Jun 4, 2007

Link CVE-2007-2999

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2007-2999

Red Hat

Severity n/a

Public date n/a

Links CVE-2007-2999