CVE-2023-20199

Cisco Duo Two-Factor Authentication for macOS Authentication Bypass Vulnerability

MEDIUM
6.6
CVSS Score
Published: June 28, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:29 AM UTC
1 product affected across 1 vendorDuo

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Severity
MEDIUM6.6
Exploit prediction
EPSS 0.3%

Description

A vulnerability in Cisco Duo Two-Factor Authentication for macOS could allow an authenticated, physical attacker to bypass secondary authentication and access an affected macOS device. This vulnerability is due to the incorrect handling of responses from Cisco Duo when the application is configured to fail open. An attacker with primary user credentials could exploit this vulnerability by attempting to authenticate to an affected device. A successful exploit could allow the attacker to access the affected device without valid permission.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.0.0 ≤ v < 2.0.2
Affected range stops below 2.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
PHYSICAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287NVD-CWE-Other

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