Cyber Resilience

CVE-2024-20268

Cisco Adaptive Security Appliance Software 9.14.1 … 9.20.2

Published
23 October 2024
Modified
11 August 2026
Patch / advisory
View advisory
CVSS Score v3.1 7.7
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS Score 0.0064 48th percentile
Risk Priority 57 floored blend · peak EPSS

Summary

CVE-2024-20268 is a high-severity Improper Handling of Extra Values (CWE-231) vulnerability in Cisco Adaptive Security Appliance Software. Its CVSS base score is 7.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 48th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

A vulnerability in the Simple Network Management Protocol (SNMP) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause an unexpected reload of the device. This vulnerability…

more

is due to insufficient input validation of SNMP packets. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device using IPv4 or IPv6. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects all versions of SNMP (versions 1, 2c, and 3) and requires a valid SNMP community string or valid SNMPv3 user credentials.

CWE(s)
CWE-231

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-20025Same product: Cisco Adaptive Security Appliance Software
CVE-2018-0101Same product: Cisco Adaptive Security Appliance Software
CVE-2024-20408Same product: Cisco Adaptive Security Appliance Software
CVE-2026-20022Same product: Cisco Adaptive Security Appliance Software
CVE-2024-20494Same product: Cisco Adaptive Security Appliance Software
CVE-2026-20020Same product: Cisco Adaptive Security Appliance Software
CVE-2026-20049Same product: Cisco Adaptive Security Appliance Software
CVE-2024-20402Same product: Cisco Adaptive Security Appliance Software
CVE-2025-20333Same product: Cisco Adaptive Security Appliance Software
CVE-2026-20100Same product: Cisco Adaptive Security Appliance Software

Affected Assets

cisco
adaptive security appliance software
9.14.1, 9.14.1.10, 9.14.1.15, 9.14.1.19, 9.14.1.30
cisco
secure firewall threat defense
6.6.0, 6.6.0.1, 6.6.1, 6.6.3, 6.6.4

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly enforces correct handling of the number and format of supplied values, stopping extra values from being accepted or processed.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require robust input validation that prevents improper handling of extra values.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect extra-value handling issues but does not prevent them by itself.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes input validation and parameter handling that can prevent extra-value processing flaws.

A.8.26 Application security requirements partial match
prevents

Application security requirements typically mandate strict input validation and parameter count checks.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles encourage robust input handling but do not specifically address extra-value scenarios.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require validation of the exact number and type of input parameters.

References