What’s Vulnerable › Vulnerabilities

CVE-2013-1235

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2013-05-04 · updated 2026-06-16

Description

Cisco Wireless LAN Controller (WLC) devices do not properly address the resource consumption of terminated TELNET sessions, which allows remote attackers to cause a denial of service (TELNET outage) by making many TELNET connections and improperly ending these connections, aka Bug ID CSCug35507.

Affected products

• Cisco 2000 Wireless Lan Controller: all versions
• Cisco 2100 Wireless Lan Controller: all versions
• Cisco 2106 Wireless Lan Controller: all versions
• Cisco 2112 Wireless Lan Controller: all versions
• Cisco 2125 Wireless Lan Controller: all versions
• Cisco 2500 Wireless Lan Controller: all versions
• Cisco 2504 Wireless Lan Controller: all versions
• Cisco 4100 Wireless Lan Controller: all versions
• Cisco 4400 Wireless Lan Controller: all versions
• Cisco 4402 Wireless Lan Controller: all versions
• Cisco 4404 Wireless Lan Controller: all versions
• Cisco 5500 Wireless Lan Controller: all versions
• Cisco 7500 Wireless Lan Controller: all versions
• Cisco 8500 Wireless Lan Controller: all versions
• Cisco Airespace 4000 Wireless Lan Controller: all versions
• Cisco Wireless Lan Controller: all versions

References

• http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1235
• http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1235

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