CVE-2020-3329: Cisco IMC Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data Role-Based Access Control Vulnerability

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-05-06 · updated 2026-06-17
Weakness: CWE-284

Description

A vulnerability in role-based access control of Cisco Integrated Management Controller (IMC) Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data could allow a read-only authenticated, remote attacker to disable user accounts on an affected system. The vulnerability is due to incorrect allocation of the enable/disable action button under the role-based access control code on an affected system. An attacker could exploit this vulnerability by authenticating as a read-only user and then updating the roles of other users to disable them. A successful exploit could allow the attacker to disable users, including administrative users.

Affected products

Cisco Integrated Management Controller: from 1.1.0.0 before 2.2.1.3 — fixed in 2.2.1.3
Cisco UCS Director: from 5.4.0.0 before 6.7.4.0 — fixed in 6.7.4.0
Cisco Ucs Director Express For Big Data: from 2.0.0.0 before 3.7.4.0 — fixed in 3.7.4.0

How to fix

Upgrade to a fixed version: Cisco Integrated Management Controller 2.2.1.3; Cisco UCS Director 6.7.4.0; Cisco Ucs Director Express For Big Data 3.7.4.0. Check the vendor advisory for mitigations.

References

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