The HTTP server in Cisco IOS on Catalyst switches does not properly handle TCP socket events, which allows remote attackers to cause a deni…

published 2013-02-13 13y ago modified 2026-06-16 4mo ago also EUVD-2013-1140

cvss: 5.4; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits: 0; none known

The HTTP server in Cisco IOS on Catalyst switches does not properly handle TCP socket events, which allows remote attackers to cause a denial of service (device crash) via crafted packets on TCP port (1) 80 or (2) 443, aka Bug ID CSCuc53853.

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Exploit prediction

1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	5.4	AV:N/AC:H/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-399 Resource Management Errors

Technology feeds

Cisco IOS rss critical rss

References

tools.cisco.com /security/center/content/CiscoSecurityNotice/CVE-2013-1100
vendor-advisory

Sources

CVE List CVE-2013-1100
NVD CVE-2013-1100

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