What’s Vulnerable › Vulnerabilities
CVE-2019-1913: Cisco Small Business 220 Series Smart Switches Remote Code Execution Vulnerabilities
- Severity: critical (CVSS 9.8 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 25.9% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2019-08-07 · updated 2026-06-17
- Weakness: CWE-119
Description
Multiple vulnerabilities in the web management interface of Cisco Small Business 220 Series Smart Switches could allow an unauthenticated, remote attacker to overflow a buffer, which then allows the execution of arbitrary code with root privileges on the underlying operating system. The vulnerabilities are due to insufficient validation of user-supplied input and improper boundary checks when reading data into an internal buffer. An attacker could exploit these vulnerabilities by sending malicious requests to the web management interface of an affected device. Depending on the configuration of the affected switch, the malicious requests must be sent via HTTP or HTTPS.
Affected products
- Cisco Sf-220-24 Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sf220-24P Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sf220-48 Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sf220-48P Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sg220-26 Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sg220-26P Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sg220-28 Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sg220-28Mp Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sg220-50 Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sg220-50P Firmware: before 1.1.4.4 — fixed in 1.1.4.4
- Cisco Sg220-52 Firmware: before 1.1.4.4 — fixed in 1.1.4.4
How to fix
Upgrade to a fixed version: 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; Cisco Sg220-52 Firmware 1.1.4.4. Check the vendor advisory for mitigations.
References
- http://packetstormsecurity.com/files/154667/Realtek-Managed-Switch-Controller-RTL83xx-Stack-Overflow.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190806-sb220-rce
- http://packetstormsecurity.com/files/154667/Realtek-Managed-Switch-Controller-RTL83xx-Stack-Overflow.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190806-sb220-rce
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