TI-2023-06830 Aliases CVE-2023-20123 GHSA-gp8j-qw75-8q9q

Cisco Duo Authentication for macOS and Duo Authentication for Windows Logon Offline Credentials Replay Vulnerability

LOW 30CWE-294Published 2023-04-05 · Updated 2024-10-28

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-294.

Summary

A vulnerability in the offline access mode of Cisco Duo Two-Factor Authentication for macOS and Duo Authentication for Windows Logon and RDP could allow an unauthenticated, physical attacker to replay valid user session credentials and gain unauthorized access to an affected macOS or Windows device. This vulnerability exists because session credentials do not properly expire. An attacker could exploit this vulnerability by replaying previously used multifactor authentication (MFA) codes to bypass MFA protection. A successful exploit could allow the attacker to gain unauthorized access to the affected device.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00247 16th 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 · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:duo::::::macos::*	before 2.0.1	Vulnerable	Cisco
cpe:2.3:a:cisco:duo_authentication_for_windows_logon_and_rdp::::::::	before 4.2.2	Vulnerable	Cisco

cpe:2.3:a:cisco:duo:*:*:*:*:*:macos:*:* Versions before 2.0.1 Vulnerable ·Cisco
cpe:2.3:a:cisco:duo_authentication_for_windows_logon_and_rdp:*:*:*:*:*:*:*:* Versions before 4.2.2 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-20123
2026-10-03 Alias added: GHSA-gp8j-qw75-8q9q

References

Advisory 1

20230405 Cisco Duo Authentication for macOS and Duo Authentication for Windows Logon Offline Credentials Replay Vulnerability

TI-2022-05221 Cisco Duo for macOS Authentication Bypass Vulnerability CVSS 3.1MEDIUM 6.8
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