CVE-2009-2435 — The Sametime server in IBM Lotus Instant Messaging and Web Conferencing 6.5.1 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to enumerate valid usernames

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MEDIUM

The Sametime server in IBM Lotus Instant Messaging and Web Conferencing 6.5.1 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to enumerate valid usernames

Published Jul 13, 2009

5.0

MEDIUM

CVSS 2.0

EPSS 1.06%

Description

The Sametime server in IBM Lotus Instant Messaging and Web Conferencing 6.5.1 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.06% 0.01064

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.

EPSS probability 0.01064

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 2, 2026	1.06% (0.01064)	63.45th	v5 (v2026.06.15)
Jun 15, 2026	1.06% (0.01064)	60.15th	v5 (v2026.06.15)
Mar 17, 2025	0.21% (0.00207)	41.02th	v4 (v2025.03.14)
Dec 12, 2024	0.28% (0.00280)	69.25th	v3 (v2023.03.01)
May 10, 2024	0.21% (0.00215)	59.34th	v3 (v2023.03.01)
Apr 25, 2024	0.20% (0.00202)	57.74th	v3 (v2023.03.01)
Mar 15, 2024	0.19% (0.00186)	54.86th	v3 (v2023.03.01)
Feb 8, 2024	0.17% (0.00170)	52.93th	v3 (v2023.03.01)
Mar 7, 2023	0.28% (0.00280)	63.41th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Sep 17, 2022	1.05% (0.01055)	50.47th	v2 (v2022.01.01)
Apr 1, 2022	1.05% (0.01055)	48.43th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)

Weaknesses (1)

CWE-255

References (2)

http://www.securityfocus.com/bid/35614
vdb-entryx_refsource_BID
http://www.senseofsecurity.com.au/advisories/SOS-09-004.pdf
x_refsource_MISCURL Repurposed

Link	Providers	Tags
http://www.securityfocus.com/bid/35614		vdb-entryx_refsource_BID
http://www.senseofsecurity.com.au/advisories/SOS-09-004.pdf		x_refsource_MISCURL Repurposed

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jul 13, 2009

Updated Sep 17, 2024

Reserved Jul 13, 2009

Link CVE-2009-2435

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2009-2435

Red Hat

Severity n/a

Public date n/a

Links CVE-2009-2435