Medium severity6.1NVD Advisory· Published Jan 26, 2020· Updated Jun 17, 2026

CVE-2020-3121

Description

A vulnerability in the web-based management interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a malicious link and access a specific page. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Sg350x 48 Firmware
cpe:2.3:o:cisco:sf350-48_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sf350 48mp Firmware
cpe:2.3:o:cisco:sf350-48mp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sf350 48p Firmware
cpe:2.3:o:cisco:sf350-48p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sf550x 48 Firmware7 versions
cpe:2.3:o:cisco:sf550x-24_firmware:*:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:o:cisco:sf550x-24_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sf550x-48_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg550x-24_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg550x-24p_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg550x-48mp_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg550x-48p_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sx550x-24_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
Cisco Systems, Inc./Sf550x 24p Firmware
cpe:2.3:o:cisco:sf550x-24p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sf550x 48mp Firmware
cpe:2.3:o:cisco:sf550x-48mp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sf550x 48p Firmware3 versions
cpe:2.3:o:cisco:sf550x-48p_firmware:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:cisco:sf550x-48p_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg550x-24mpp_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg550x-48_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
Cisco Systems, Inc./Sg250 08 Firmware
cpe:2.3:o:cisco:sg250-08_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 08hp Firmware
cpe:2.3:o:cisco:sg250-08hp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 10p Firmware
cpe:2.3:o:cisco:sg250-10p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 18 Firmware
cpe:2.3:o:cisco:sg250-18_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 24 Firmware
cpe:2.3:o:cisco:sg250-24_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 24p Firmware
cpe:2.3:o:cisco:sg250-24p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 26 Firmware
cpe:2.3:o:cisco:sg250-26_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 26hp Firmware
cpe:2.3:o:cisco:sg250-26hp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 26p Firmware
cpe:2.3:o:cisco:sg250-26p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 48 Firmware
cpe:2.3:o:cisco:sg250-48_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 48hp Firmware
cpe:2.3:o:cisco:sg250-48hp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 50 Firmware
cpe:2.3:o:cisco:sg250-50_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 50hp Firmware
cpe:2.3:o:cisco:sg250-50hp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250 50p Firmware
cpe:2.3:o:cisco:sg250-50p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250x 24 Firmware
cpe:2.3:o:cisco:sg250x-24_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250x 24p Firmware
cpe:2.3:o:cisco:sg250x-24p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250x 48 Firmware
cpe:2.3:o:cisco:sg250x-48_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg250x 48p Firmware
cpe:2.3:o:cisco:sg250x-48p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg350 28p Firmware2 versions
cpe:2.3:o:cisco:sg350-10_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:sg350-10_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg350-28p_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
Cisco Systems, Inc./Sg350 28 Firmware2 versions
cpe:2.3:o:cisco:sg350-10mp_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:sg350-10mp_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
- cpe:2.3:o:cisco:sg350-28_firmware:*:*:*:*:*:*:*:*range: <=2.5.0.90
Cisco Systems, Inc./Sg350 10p Firmware
cpe:2.3:o:cisco:sg350-10p_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg350x 48mp Firmware
cpe:2.3:o:cisco:sg350-28mp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg355 10mp Firmware
cpe:2.3:o:cisco:sg355-10mp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sg550x 24mp Firmware
cpe:2.3:o:cisco:sg550x-24mp_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sx550x 12ft Firmware
cpe:2.3:o:cisco:sx550x-12ft_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sx550x 16ft Firmware
cpe:2.3:o:cisco:sx550x-16ft_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sx550x 24ft Firmware
cpe:2.3:o:cisco:sx550x-24ft_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Sx550x 52 Firmware
cpe:2.3:o:cisco:sx550x-52_firmware:*:*:*:*:*:*:*:*
Range: <=2.5.0.90
Cisco Systems, Inc./Small Business Smart and Managed Switchesllm-fuzzy
Cisco Systems, Inc./500 Series Stackable Managed Switchescpe-rescue
Range: unspecified

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-sbsms-xssnvdVendor Advisory

News mentions

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