CVE-2020-3121
Cisco Small Business Smart and Managed Switches Cross-Site Scripting Vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
6.1
Cisco Small Business Smart and Managed Switches Cross-Site Scripting Vulnerability
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.
- Record
CVE-2020-3121- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2020-24392
6.1
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.
- Record
EUVD-2020-24392- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-p382-hh5c-h4rq No score
A vulnerability in the web-based management interface of Cisco Small Business Smart and Managed...
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.
- Record
GHSA-p382-hh5c-h4rq- Updated
- 2026-11-02
NVD
6.1
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.
- Record
CVE-2020-3121- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
- cisco 550x series stackable managed switches
- cisco sf350-48 firmware
- cisco sf350-48mp firmware
- cisco sf350-48p firmware
- cisco sf550x-24 firmware
- cisco sf550x-24p firmware
- cisco sf550x-48 firmware
- cisco sf550x-48mp firmware
- cisco sf550x-48p firmware
- cisco sg250-08 firmware
- cisco sg250-08hp firmware
- cisco sg250-10p firmware
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- cisco sg250-18 firmware
- cisco sg250-24 firmware
- cisco sg250-24p firmware
- cisco sg250-26 firmware
- cisco sg250-26hp firmware
- cisco sg250-26p firmware
- cisco sg250-48 firmware
- cisco sg250-48hp firmware
- cisco sg250-50 firmware
- cisco sg250-50hp firmware
- cisco sg250-50p firmware
- cisco sg250x-24 firmware
- cisco sg250x-24p firmware
- cisco sg250x-48 firmware
- cisco sg250x-48p firmware
- cisco sg350-10 firmware
- cisco sg350-10mp firmware
- cisco sg350-10p firmware
- cisco sg350-28 firmware
- cisco sg350-28mp firmware
- cisco sg350-28p firmware
- cisco sg355-10mp firmware
- cisco sg550x-24 firmware
- cisco sg550x-24mp firmware
- cisco sg550x-24mpp firmware
- cisco sg550x-24p firmware
- cisco sg550x-48 firmware
- cisco sg550x-48mp firmware
- cisco sg550x-48p firmware
- cisco sx550x-12ft firmware
- cisco sx550x-16ft firmware
- cisco sx550x-24 firmware
- cisco sx550x-24ft firmware
- cisco sx550x-52 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-3121 is a medium vulnerability (CVSS 6.1) in Cisco 550x Series Stackable Managed Switches, published January 26, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.07%, the 64th percentile. No source names a fixed version.