TI-2024-13227 Aliases CVE-2024-20293 GHSA-hg56-vqpv-9738

A vulnerability in the activation of an access control list (ACL) on Cisco Adaptive…

LOW 34CWE-436Published 2024-05-22 · Updated 2024-08-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

A vulnerability in the activation of an access control list (ACL) on Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the protection that is offered by a configured ACL on an affected device. This vulnerability is due to a logic error that occurs when an ACL changes from inactive to active in the running configuration of an affected device. An attacker could exploit this vulnerability by sending traffic through the affected device that should be denied by the configured ACL. The reverse condition is also true—traffic that should be permitted could be denied by the configured ACL. A successful exploit could allow the attacker to bypass configured ACL protections on the affected device, allowing the attacker to access trusted networks that the device might be protecting. Note: This vulnerability applies to both IPv4 and IPv6 traffic as well as dual-stack ACL configurations in which both IPv4 and IPv6 ACLs are configured on an interface.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00395 33rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Adaptive Security Appliance (ASA) Software	9.19.1; 9.19.1.5; 9.19.1.9; 9.19.1.12; 9.19.1.18; 9.19.1.22; 9.19.1.24; 9.20.1; 9.20.1.5	—	No fix listed	CNA
Cisco	Cisco Firepower Threat Defense Software	7.3.0; 7.3.1; 7.3.1.1; 7.3.1.2; 7.4.0	—	No fix listed	CNA

Cisco Adaptive Security Appliance (ASA) Software VendorCisco Affected 9.19.1; 9.19.1.5; 9.19.1.9; 9.19.1.12; 9.19.1.18; 9.19.1.22; 9.19.1.24; 9.20.1; 9.20.1.5 Fixed in — No fix listed CNA
Cisco Firepower Threat Defense Software VendorCisco Affected 7.3.0; 7.3.1; 7.3.1.1; 7.3.1.2; 7.4.0 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::	9.19.1 – 9.19.1.24	Vulnerable	Cisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1:::::::*	9.20.1	Vulnerable	Cisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1.5:::::::*	9.20.1.5	Vulnerable	Cisco
cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::	7.3.0 – 7.4.0	Vulnerable	Cisco

cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* Versions 9.19.1 – 9.19.1.24 Vulnerable ·Cisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1:*:*:*:*:*:*:* Versions 9.20.1 Vulnerable ·Cisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1.5:*:*:*:*:*:*:* Versions 9.20.1.5 Vulnerable ·Cisco
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions 7.3.0 – 7.4.0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-20293
2026-10-03 Alias added: GHSA-hg56-vqpv-9738

References

Advisory 1

cisco-sa-asaftd-ogsnsg-aclbyp-3XB8q6jX

TI-2025-14628 Buffer overflow in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.9
TI-2016-05454 Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on… KEVCVSS 3.1HIGH 8.8
TI-2023-06973 Authentication bypass in Cisco Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.1
TI-2026-82192 Denial of service in Cisco Secure Firewall ASA and FTD SSL VPN KEVCVSS 3.1HIGH 8.6
TI-2026-16533 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense… KEVCVSS 3.1HIGH 8.6
TI-2025-14657 Missing authorization in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1HIGH 8.6

See all 354 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences