CVE-2024-20402

A vulnerability in the SSL VPN feature for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to a logic error in memory management when the device is handling SSL VPN connections. An attacker could exploit this vulnerability by sending crafted SSL/TLS packets to the SSL VPN server of the affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Published: 2024-10-23 Last update: 2025-07-15 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-20402 is rated Moderate Risk (60.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.84%). 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-2024-20402

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 2025-12-01 0.33% 0.84% +0.51%
2 2025-11-21 0.42% 0.33% -0.09%
3 2025-11-18 — 0.42% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20402

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.6 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 3.9 4.0 [email protected]
8.6 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 3.9 4.0 [email protected]

Weakness enumeration for CVE-2024-20402

Affected software / configurations for CVE-2024-20402

Vendor Product Version Raw CPE
cisco adaptive_security_appliance_software 9.8.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.1.5 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.1.5:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.1.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.1.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.8 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.8:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.14 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.14:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.15 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.15:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.17 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.17:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.20 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.20:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.24 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.24:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.26 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.26:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.28 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.28:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.33 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.33:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.35 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.35:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.38 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.38:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.2.45 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.2.45:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.8 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.8:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.11 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.11:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.14 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.14:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.16 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.16:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.18 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.18:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.21 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.21:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.26 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.26:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.3.29 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.3.29:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.8 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.8:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.10 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.10:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.12 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.12:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.15 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.15:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.17 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.17:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.20 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.20:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.22 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.22:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.25 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.25:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.26 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.26:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.29 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.29:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.32 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.32:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.33 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.33:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.34 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.34:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.35 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.35:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.39 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.39:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.40 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.40:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.41 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.41:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.43 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.43:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.44 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.44:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.45 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.45:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.46 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.46:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.8.4.48 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.8.4.48:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.1.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.1.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.1.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.1.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.5 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.5:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.9 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.9:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.9 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.9:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.12 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.12:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.8 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.8:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.10 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.10:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.13 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.13:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.18 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.18:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.24 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.24:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.26 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.26:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.29 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.29:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.30 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.30:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.35 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.35:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.37 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.37:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.38 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.38:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.39 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.39:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.40 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.40:*:*:*:*:*:*:*

References for CVE-2024-20402

cvelogic Threat Intelligence