CVE-2022-20927

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% 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-120

Description

A vulnerability in the SSL/TLS client of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management when a device initiates SSL/TLS connections. An attacker could exploit this vulnerability by ensuring that the device will connect to an SSL/TLS server that is using specific encryption parameters. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a DoS condition.

Affected products

Cisco ASA Software: 9.13.1, 9.13.1.2, 9.13.1.7, 9.13.1.10, 9.13.1.12, 9.13.1.13 (+28)
Cisco Firepower Services Software For Asa: all versions
Cisco Firepower Threat Defense Software: from 6.5.0 through 6.5.0.5; from 6.7.0 through 6.7.0.3; 6.6.0, 6.6.0.1, 6.6.1, 6.6.3, 6.6.4, 6.6.5 (+1)

References

Get alerted when CVE-2022-20927 or the next vulnerability affects your stack