CVE-2018-15439

CRITICAL

Cisco Small Business Switches - Unauthenticated Bypass via Hard-coded Credentials

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-15439. Includes Metasploit module exploits/linux/local/cpi_runrshell_priv_esc.

AI-analyzed exploit summary This Metasploit module exploits a privilege escalation vulnerability in Cisco Prime Infrastructure's runrshell binary by injecting commands into the argument, allowing execution as root. It uploads a payload, sets it as executable, and executes it with elevated privileges.

Description

A vulnerability in the Cisco Small Business Switches software could allow an unauthenticated, remote attacker to bypass the user authentication mechanism of an affected device. The vulnerability exists because under specific circumstances, the affected software enables a privileged user account without notifying administrators of the system. An attacker could exploit this vulnerability by using this account to log in to an affected device and execute commands with full admin rights. Cisco has not released software updates that address this vulnerability. This advisory will be updated with fixed software information once fixed software becomes available. There is a workaround to address this vulnerability.

Exploits (1)

metasploit WORKING POC EXCELLENT
rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/cpi_runrshell_priv_esc.rb

This Metasploit module exploits a privilege escalation vulnerability in Cisco Prime Infrastructure's runrshell binary by injecting commands into the argument, allowing execution as root. It uploads a payload, sets it as executable, and executes it with elevated privileges.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Trivial
Reliability
Reliable
Target: Cisco Prime Infrastructure 3.4.0
Auth required
Prerequisites: Access to a shell or meterpreter session on the target · Write permissions in a directory (default: /tmp)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/105873

Scores

CVSS v3 9.8
EPSS 0.4974
EPSS Percentile 98.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-798
Status published
Products (50)
cisco/sf200-24_firmware
cisco/sf200-24fp_firmware
cisco/sf200-24p_firmware
cisco/sf200-48_firmware
cisco/sf200-48p_firmware
cisco/sf250-24_firmware
cisco/sf250-24p_firmware
cisco/sf250-48_firmware
cisco/sf250-48hp_firmware
cisco/sf300-08_firmware
... and 40 more
Published Nov 08, 2018
Tracked Since Feb 18, 2026