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CVE-2020-3356: Cisco Data Center Network Manager Stored Cross-Site Scripting Vulnerability

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-18 · updated 2026-06-17
• Weakness: CWE-79

Description

A vulnerability in the web-based management interface of Cisco Data Center Network Manager (DCNM) 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 input validation by the web-based management interface. An attacker could exploit this vulnerability by interacting with the interface in a way that injects malicious content in a log file. 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.

Affected products

• Cisco Data Center Network Manager: through 11.3\(1\)

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dcnm-stored-xss-eUyGPqxm
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dcnm-stored-xss-eUyGPqxm

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