CVE-2015-4331 — Cisco Prime Infrastructure (PI) 1.4(0.45) and earlier, when AAA authentication is used, allows remote authenticated users to bypass intended access restrictions via a username with a modified composition of lowercase and uppercase characters, aka Bug ID CSum59958

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LOW

Cisco Prime Infrastructure (PI) 1.4(0.45) and earlier, when AAA authentication is used, allows remote authenticated users to bypass intended access restrictions via a username with a modified composition of lowercase and uppercase characters, aka Bug ID CSum59958

Published Aug 22, 2015

3.5

LOW

CVSS 2.0

EPSS 1.78%

Description

Cisco Prime Infrastructure (PI) 1.4(0.45) and earlier, when AAA authentication is used, allows remote authenticated users to bypass intended access restrictions via a username with a modified composition of lowercase and uppercase characters, aka Bug ID CSum59958.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.78% 0.01778

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

EPSS probability 0.01778

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 (10 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	1.78% (0.01778)	77.42th	v5 (v2026.06.15)
Jun 15, 2026	1.78% (0.01778)	75.27th	v5 (v2026.06.15)
Mar 17, 2025	0.15% (0.00147)	32.58th	v4 (v2025.03.14)
Dec 12, 2024	0.09% (0.00090)	40.27th	v3 (v2023.03.01)
Jun 26, 2024	0.09% (0.00090)	38.90th	v3 (v2023.03.01)
Mar 7, 2023	0.09% (0.00090)	36.89th	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-264

References (2)

http://tools.cisco.com/security/center/viewAlert.x?alertId=40553
vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securitytracker.com/id/1033356
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry

Link	Providers	Tags
http://tools.cisco.com/security/center/viewAlert.x?alertId=40553		vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securitytracker.com/id/1033356		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Aug 22, 2015

Updated Aug 6, 2024

Reserved Jun 4, 2015

Link CVE-2015-4331

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2015-4331

Red Hat

Severity n/a

Public date n/a

Links CVE-2015-4331