CVE-2022-20927

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.

Published: 2022-11-15 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-20927 is rated Moderate Risk (45.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.19%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-20927

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-10 0.35% 0.19% -0.16%
2 2025-12-24 0.48% 0.35% -0.13%
3 2025-11-23 — 0.48% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-20927

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.7 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.1 4.0 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2022-20927

Affected software / configurations for CVE-2022-20927

Vendor Product Version Raw CPE
cisco adaptive_security_appliance_software 9.13.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.10 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.10:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.12 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.12:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.13 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.13:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.16 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.16:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.19 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.19:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.13.1.21 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.21:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.1.10 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.1.10:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.1.15 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.1.15:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.1.19 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.1.19:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.1.30 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.1.30:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.2.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.2.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.2.8 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.2.8:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.2.13 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.2.13:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.2.15 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.2.15:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.3.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.3.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.3.9 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.3.9:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.3.11 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.3.11:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.3.13 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.3.13:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.3.15 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.3.15:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.14.3.18 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.3.18:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1.10 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1.10:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1.15 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1.15:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1.16 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1.16:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1.17 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1.17:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.15.1.21 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.15.1.21:*:*:*:*:*:*:*
cisco firepower_threat_defense >= 6.5.0, <= 6.5.0.5 cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
cisco firepower_threat_defense >= 6.7.0, <= 6.7.0.3 cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
cisco firepower_threat_defense 6.6.0 cpe:2.3:a:cisco:firepower_threat_defense:6.6.0:*:*:*:*:*:*:*
cisco firepower_threat_defense 6.6.0.1 cpe:2.3:a:cisco:firepower_threat_defense:6.6.0.1:*:*:*:*:*:*:*
cisco firepower_threat_defense 6.6.1 cpe:2.3:a:cisco:firepower_threat_defense:6.6.1:*:*:*:*:*:*:*
cisco firepower_threat_defense 6.6.3 cpe:2.3:a:cisco:firepower_threat_defense:6.6.3:*:*:*:*:*:*:*
cisco firepower_threat_defense 6.6.4 cpe:2.3:a:cisco:firepower_threat_defense:6.6.4:*:*:*:*:*:*:*
cisco firepower_threat_defense 6.6.5 cpe:2.3:a:cisco:firepower_threat_defense:6.6.5:*:*:*:*:*:*:*
cisco firepower_threat_defense 6.6.5.1 cpe:2.3:a:cisco:firepower_threat_defense:6.6.5.1:*:*:*:*:*:*:*
cisco firepower_services_software_for_asa — cpe:2.3:a:cisco:firepower_services_software_for_asa:-:*:*:*:*:*:*:*

References for CVE-2022-20927

cvelogic Threat Intelligence