CVE-2019-1912

CRITICAL

Cisco Small Business 220 Series Smart Switches < 1.1.4.4 - Arbitrary File Upload

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-1912.

AI-analyzed exploit summary This Python script is a functional exploit for CVE-2019-1912, targeting a stack overflow vulnerability in Realtek Managed Switch Controller (RTL83xx) devices. It leverages a 'one byte read-write loop' without boundary checks in Boa/Hydra web servers, allowing remote code execution via a reverse shell.

Description

A vulnerability in the web management interface of Cisco Small Business 220 Series Smart Switches could allow an unauthenticated, remote attacker to upload arbitrary files. The vulnerability is due to incomplete authorization checks in the web management interface. An attacker could exploit this vulnerability by sending a malicious request to certain parts of the web management interface. Depending on the configuration of the affected switch, the malicious request must be sent via HTTP or HTTPS. A successful exploit could allow the attacker to modify the configuration of an affected device or to inject a reverse shell. This vulnerability affects Cisco Small Business 220 Series Smart Switches running firmware versions prior to 1.1.4.4 with the web management interface enabled. The web management interface is enabled via both HTTP and HTTPS by default.

Exploits (1)

exploitdb WORKING POC
pythonremotehardware
https://www.exploit-db.com/exploits/47442

This Python script is a functional exploit for CVE-2019-1912, targeting a stack overflow vulnerability in Realtek Managed Switch Controller (RTL83xx) devices. It leverages a 'one byte read-write loop' without boundary checks in Boa/Hydra web servers, allowing remote code execution via a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Realtek Managed Switch Controller (RTL83xx) with various vendor firmwares (e.g., Cisco, NETGEAR, Zyxel)
No auth needed
Prerequisites: Network access to the target device · Python 2.7 environment with required libraries (e.g., pwntools, Crypto)
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 9.1
EPSS 0.1704
EPSS Percentile 96.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-285 CWE-863
Status published
Products (11)
cisco/sf-220-24_firmware < 1.1.4.4
cisco/sf220-24p_firmware < 1.1.4.4
cisco/sf220-48_firmware < 1.1.4.4
cisco/sf220-48p_firmware < 1.1.4.4
cisco/sg220-26_firmware < 1.1.4.4
cisco/sg220-26p_firmware < 1.1.4.4
cisco/sg220-28_firmware < 1.1.4.4
cisco/sg220-28mp_firmware < 1.1.4.4
cisco/sg220-50_firmware < 1.1.4.4
cisco/sg220-50p_firmware < 1.1.4.4
... and 1 more
Published Aug 07, 2019
Tracked Since Feb 18, 2026