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Vulnerability record · CVE-2019-1912 · published 7 August 2019

CVE-2019-1912: Cisco sf-220-24 firmware improper authorization vulnerability

Cisco · Sf 220 24 Firmware

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.

9.1 CVSS 3.1 Critical EPSS 17% · top 3.0% CWE-285 · Improper authorizationCWE-863 · Incorrect authorization
9.1CVSS 3.1 base score, v2 6.4
17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

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

References

LinkTags
http://packetstormsecurity.com/files/154667/Realtek-Managed-Switch-Controller-RTL83xx-Stack-Overflow.html Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190806-sb220-auth_bypass Vendor Advisory
http://packetstormsecurity.com/files/154667/Realtek-Managed-Switch-Controller-RTL83xx-Stack-Overflow.html Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190806-sb220-auth_bypass Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2019-1912), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.