Is CVE-2013-1235 being actively exploited?

CVE-2013-1235 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-1235?

CVE-2013-1235 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2013-1235

MEDIUM · CVSS 5.0EPSS 1.2%EU EUVD

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.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS score: 1.2% (68th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-1275)
Published: May 4, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-1275 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

cisco / 2000 wireless lan controller
cisco / 2100 wireless lan controller
cisco / 2106 wireless lan controller
cisco / 2112 wireless lan controller
cisco / 2125 wireless lan controller
cisco / 2500 wireless lan controller
cisco / 2504 wireless lan controller
cisco / 4100 wireless lan controller
cisco / 4400 wireless lan controller
cisco / 4402 wireless lan controller
cisco / 4404 wireless lan controller
cisco / 5500 wireless lan controller
cisco / 7500 wireless lan controller
cisco / 8500 wireless lan controller
cisco / airespace 4000 wireless lan controller
cisco / wireless lan controller

Certified products that may be affected

8 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Systems 2504, 5520, 8510 and 8540 Wireless LAN Controllers - Cisco Systems, Inc. - FIPS 140 3098 - historical
Cisco Systems 2504, 7500, 8510 Wireless LAN Controllers and Cisco Catalyst 6807-XL Switch with Wireless Services Module-2 (WiSM2) - Cisco Systems, Inc. - FIPS 140 2497 - historical
Cisco 4402 and 4404 Wireless LAN Controllers - Cisco Systems, Inc. - FIPS 140 1853 - historical
Cisco 4402 and 4404 Wireless LAN Controllers - Cisco Systems, Inc. - FIPS 140 1435 - historical
Cisco 4402 and 4404 Wireless LAN Controllers - Cisco Systems, Inc. - FIPS 140 1213 - historical

See all 8 in the Security Certifications Explorer.

References

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1235(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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