CVE-2022-20928

Severity: medium (CVSS 5.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-11-15 · updated 2026-08-11
Weakness: CWE-863

Description

A vulnerability in the authentication and authorization flows for VPN connections in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to establish a connection as a different user. This vulnerability is due to a flaw in the authorization verifications during the VPN authentication flow. An attacker could exploit this vulnerability by sending a crafted packet during a VPN authentication. The attacker must have valid credentials to establish a VPN connection. A successful exploit could allow the attacker to establish a VPN connection with access privileges from a different user.

Affected products

Cisco ASA Software: 9.6.1, 9.6.1.3, 9.6.1.5, 9.6.1.10, 9.6.2, 9.6.2.1 (+212)
Cisco Firepower Threat Defense Software: 6.1.0, 6.1.0.1, 6.1.0.2, 6.1.0.3, 6.1.0.4, 6.1.0.5 (+81)

References

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