CVE-2021-1272: Cisco Data Center Network Manager Server-Side Request Forgery Vulnerability

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-01-20 · updated 2026-06-17
Weakness: CWE-918

Description

A vulnerability in the session validation feature of Cisco Data Center Network Manager (DCNM) could allow an unauthenticated, remote attacker to bypass access controls and conduct a server-side request forgery (SSRF) attack on a targeted system. This vulnerability is due to insufficient validation of parameters in a specific HTTP request by an attacker. An attacker could exploit this vulnerability by sending a crafted HTTP request to an authenticated user of the DCNM web application. A successful exploit could allow the attacker to bypass access controls and gain unauthorized access to the Device Manager application, which provides access to network devices managed by the system.

Affected products

Cisco Data Center Network Manager: before 11.5\(1\) — fixed in 11.5\(1\)

How to fix

Upgrade to a fixed version: Cisco Data Center Network Manager 11.5\(1\). Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-1272 or the next vulnerability affects your stack