CVE-2015-6263 — The RADIUS client implementation in Cisco IOS 15.4(3)M2.2, when a shared RADIUS secret is configured, allows remote RADIUS servers to cause a denial of service (device reload) via malformed answers, aka Bug ID CSCuu59324

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MEDIUM

The RADIUS client implementation in Cisco IOS 15.4(3)M2.2, when a shared RADIUS secret is configured, allows remote RADIUS servers to cause a denial of service (device reload) via malformed answers, aka Bug ID CSCuu59324

Published Oct 12, 2015

6.3

MEDIUM

CVSS 2.0

EPSS 1.05%

Description

The RADIUS client implementation in Cisco IOS 15.4(3)M2.2, when a shared RADIUS secret is configured, allows remote RADIUS servers to cause a denial of service (device reload) via malformed answers, aka Bug ID CSCuu59324.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.05% 0.01048

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

EPSS probability 0.01048

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	1.05% (0.01048)	62.94th	v5 (v2026.06.15)
Jun 15, 2026	1.05% (0.01048)	59.63th	v5 (v2026.06.15)
Mar 17, 2025	0.60% (0.00596)	67.48th	v4 (v2025.03.14)
Dec 12, 2024	0.08% (0.00080)	36.19th	v3 (v2023.03.01)
Jul 2, 2024	0.08% (0.00080)	34.62th	v3 (v2023.03.01)
Mar 7, 2023	0.08% (0.00080)	32.61th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Sep 10, 2022	0.89% (0.00885)	26.24th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)

Weaknesses (1)

CWE-399

References (2)

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151005-ios-radius
vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securitytracker.com/id/1033747
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry

Link	Providers	Tags
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151005-ios-radius		vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securitytracker.com/id/1033747		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Oct 12, 2015

Updated Aug 6, 2024

Reserved Aug 17, 2015

Link CVE-2015-6263

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2015-6263

Red Hat

Severity n/a

Public date n/a

Links CVE-2015-6263