CVE-2015-0610 — Race condition in the object-group ACL feature in Cisco IOS 15.5(2)T and earlier allows remote attackers to bypass intended access restrictions via crafted network traffic that triggers improper handling of the timing of process switching and Cisco Express Forwarding (CEF) switching, aka Bug ID CSCun21071

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MEDIUM

Race condition in the object-group ACL feature in Cisco IOS 15.5(2)T and earlier allows remote attackers to bypass intended access restrictions via crafted network traffic that triggers improper handling of the timing of process switching and Cisco Express Forwarding (CEF) switching, aka Bug ID CSCun21071

Published Feb 12, 2015

4.3

MEDIUM

CVSS 2.0

EPSS 1.43%

Description

Race condition in the object-group ACL feature in Cisco IOS 15.5(2)T and earlier allows remote attackers to bypass intended access restrictions via crafted network traffic that triggers improper handling of the timing of process switching and Cisco Express Forwarding (CEF) switching, aka Bug ID CSCun21071.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.43% 0.01426

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

EPSS probability 0.01426

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	1.43% (0.01426)	71.99th	v5 (v2026.06.15)
Jun 15, 2026	1.43% (0.01426)	69.38th	v5 (v2026.06.15)
Mar 17, 2025	0.25% (0.00247)	46.05th	v4 (v2025.03.14)
Dec 12, 2024	0.42% (0.00420)	75.00th	v3 (v2023.03.01)
Feb 8, 2024	0.42% (0.00420)	73.49th	v3 (v2023.03.01)
Mar 7, 2023	0.42% (0.00420)	70.15th	v3 (v2023.03.01)
Mar 6, 2023	1.21% (0.01213)	66.61th	v2 (v2022.01.01)
Feb 17, 2023	1.21% (0.01213)	66.22th	v2 (v2022.01.01)
Apr 1, 2022	1.21% (0.01213)	64.21th	v2 (v2022.01.01)
Feb 4, 2022	1.21% (0.01213)	40.54th	v2 (v2022.01.01)

Weaknesses (1)

CWE-362

Race Condition

References (5)

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2015-0610
vendor-advisoryx_refsource_CISCOVendor Advisory
http://tools.cisco.com/security/center/viewAlert.x?alertId=37423
x_refsource_CONFIRMVendor Advisory
http://www.securityfocus.com/bid/72565
vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1031732
vdb-entryx_refsource_SECTRACK
https://exchange.xforce.ibmcloud.com/vulnerabilities/100807
vdb-entryx_refsource_XF

Link	Providers	Tags
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2015-0610		vendor-advisoryx_refsource_CISCOVendor Advisory
http://tools.cisco.com/security/center/viewAlert.x?alertId=37423		x_refsource_CONFIRMVendor Advisory
http://www.securityfocus.com/bid/72565		vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1031732		vdb-entryx_refsource_SECTRACK
https://exchange.xforce.ibmcloud.com/vulnerabilities/100807		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Feb 12, 2015

Updated Aug 6, 2024

Reserved Jan 7, 2015

Link CVE-2015-0610

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2015-0610

Red Hat

Severity n/a

Public date n/a

Links CVE-2015-0610