Read the docs
TI-2023-06905 Aliases CVE-2023-20199GHSA-mggg-vw4x-89wv

Cisco Duo Two-Factor Authentication for macOS Authentication Bypass Vulnerability

Priority LOW 29CWE-287Published · Updated

Key facts

Attack vector
Physical
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

EPSS 0.00293 21st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Duoall versions—No fix listedCNA
  • Cisco Duo VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:duo:*:*:*:*:*:macos:*:*2.0.0 to before 2.0.2VulnerableCisco
  • cpe:2.3:a:cisco:duo:*:*:*:*:*:macos:*:* Versions 2.0.0 to before 2.0.2 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-20199
  2. 2026-10-03 Alias added: GHSA-mggg-vw4x-89wv

References

Advisory 1

  • TI-2022-05221 Cisco Duo for macOS Authentication Bypass Vulnerability CVSS 3.1MEDIUM 6.8
  • TI-2023-06830 Cisco Duo Authentication for macOS and Duo Authentication for Windows Logon Offline Credentials Replay Vulnerability CVSS 3.1MEDIUM 6.3
  • TI-2025-14556 Command injection in Cisco Duo CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences