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Vulnerability record · CVE-2011-3271 · published 3 October 2011

CVE-2011-3271: Cisco ios vulnerability

Cisco · Ios

Unspecified vulnerability in the Smart Install functionality in Cisco IOS 12.2 and 15.1 allows remote attackers to execute arbitrary code or cause a denial of service (device crash) via crafted TCP packets to port 4786, aka Bug ID CSCto10165.

10.0 CVSS 2.0 High EPSS 11% · top 4.3%
10.0CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

Unspecified vulnerability in the Smart Install functionality in Cisco IOS 12.2 and 15.1 allows remote attackers to execute arbitrary code or cause a denial of service (device crash) via crafted TCP packets to port 4786, aka Bug ID CSCto10165.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://tools.cisco.com/security/center/viewAlert.x?alertId=24115
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4f.shtml Vendor Advisory
http://tools.cisco.com/security/center/viewAlert.x?alertId=24115
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4f.shtml Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-0171Cisco IOS Smart Install improper input validation allows remote code executionCisco IOS and IOS XE Smart Install fails to properly validate packet data, so a crafted Smart Install message sent to TCP port 4786 can overflow a bu…KEVEPSS 99%analysed9.8CVE-2017-12240Cisco IOS and IOS XE DHCP Relay Buffer Overflow RCEThe DHCP relay subsystem in Cisco IOS 12.2 through 15.6 and Cisco IOS XE contains a buffer overflow caused by improper input validation of DHCPv4 pac…KEVEPSS 14%analysed9.8CVE-2017-3881Cisco IOS/IOS XE CMP Telnet Option Handling RCECisco IOS and IOS XE fail to restrict CMP-specific Telnet options to internal cluster communications and mishandle malformed CMP Telnet options, so a…KEVEPSS 99%analysed8.8CVE-2018-0167Cisco IOS, IOS XE and IOS XR LLDP buffer overflowMultiple buffer overflow flaws exist in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS, IOS XE and IOS XR Software. An unauthenticat…KEVEPSS 3.4%analysed8.8CVE-2017-6736Cisco IOS and IOS XE SNMP buffer overflow remote code executionThe SNMP subsystem in Cisco IOS and IOS XE contains a buffer overflow that can be triggered by a crafted SNMP packet sent over IPv4 or IPv6. It affec…KEVEPSS 70%analysed8.8CVE-2017-6737Cisco IOS and IOS XE SNMP Buffer Overflow RCECisco IOS and IOS XE contain a buffer overflow in the SNMP implementation that affects SNMPv1, v2c, and v3. An authenticated remote attacker who know…KEVEPSS 45%analysed8.8CVE-2017-6738Cisco IOS and IOS XE SNMP buffer overflow allows remote code executionThe SNMP subsystem in Cisco IOS and IOS XE Software contains a buffer overflow that affects SNMP versions 1, 2c, and 3. An authenticated remote attac…KEVEPSS 11%analysed8.8CVE-2017-6739Cisco IOS and IOS XE SNMP buffer overflow allows remote code executionCisco IOS and IOS XE contain a buffer overflow in the SNMP implementation that affects SNMP versions 1, 2c, and 3. A remote attacker who knows the SN…KEVEPSS 11%analysed

Source: NIST National Vulnerability Database (record CVE-2011-3271), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.