CVE-2014-3291

Cisco Wireless LAN Controller (WLC) devices allow remote attackers to cause a denial of service (NULL pointer dereference and device restart) via a zero value in Cisco Discovery Protocol packet data that is not properly handled during SNMP polling, aka Bug ID CSCuo12321.

Published: 2014-06-08 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Conclusion & alert: CVE-2014-3291 is rated Moderate Risk (43.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.02%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2014-3291

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.53%	1.02%	+0.49%
2	2025-03-19	0.56%	0.53%	-0.02%
3	2025-03-17	—	0.56%	—

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-3291

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.7	2.0	MEDIUM	`AV:A/AC:M/Au:N/C:N/I:N/A:C` Click to expand Access vector (AV:A) Requires access to an adjacent network segment. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:C) Complete availability impact.	5.5	6.9	[email protected]

Weakness enumeration for CVE-2014-3291

CWE-20 MITRE ↗

NVD evaluator notes for CVE-2014-3291

Comment: Per: http://cwe.mitre.org/data/definitions/476.html "CWE-476: NULL Pointer Dereference"

Affected software / configurations for CVE-2014-3291

Vendor	Product	Version	Raw CPE
cisco	wireless_lan_controller	—	cpe:2.3:h:cisco:wireless_lan_controller::::::::

References for CVE-2014-3291

URL	Tags
http://secunia.com/advisories/57895	Permissions Required
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3291	Vendor Advisory
http://tools.cisco.com/security/center/viewAlert.x?alertId=34558	Vendor Advisory
http://www.securityfocus.com/bid/67926	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1030410	Third Party Advisory VDB Entry

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