TI-2022-05221 Aliases CVE-2022-20662 GHSA-2x3m-h8fc-hm6p

Cisco Duo for macOS Authentication Bypass Vulnerability

LOW 32CWE-287Published 2022-09-30 · Updated 2024-11-06

Key facts

Attack vector: Physical
Privileges required: None
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 the smart card login authentication of Cisco Duo for macOS could allow an unauthenticated attacker with physical access to bypass authentication. This vulnerability exists because the assigned user of a smart card is not properly matched with the authenticating user. An attacker could exploit this vulnerability by configuring a smart card login to bypass Duo authentication. A successful exploit could allow the attacker to use any personal identity verification (PIV) smart card for authentication, even if the smart card is not assigned to the authenticating user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00376 31st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Duo	all versions	—	No fix listed	CNA

Cisco Duo VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:duo::::::macos::*	before 2.0.0	Vulnerable	Cisco

cpe:2.3:a:cisco:duo:*:*:*:*:*:macos:*:* Versions before 2.0.0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2022-20662
2026-10-03 Alias added: GHSA-2x3m-h8fc-hm6p

References

Advisory 1

20220928 Cisco Duo for macOS Authentication Bypass Vulnerability

TI-2023-06830 Cisco Duo Authentication for macOS and Duo Authentication for Windows Logon Offline Credentials Replay Vulnerability CVSS 3.1MEDIUM 6.3
TI-2023-06905 Cisco Duo Two-Factor Authentication for macOS Authentication Bypass Vulnerability CVSS 3.1MEDIUM 6.6
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