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TI-2020-16486 Aliases CVE-2020-27124GHSA-j69q-qfwm-m736

Cisco Adaptive Security Appliance Software SSL/TLS Denial of Service Vulnerability

Priority MEDIUM 45CWE-457Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-457 and the CVSS impact.

Summary

A vulnerability in the SSL/TLS handler of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause the affected device to reload unexpectedly, leading to a denial of service (DoS) condition. The vulnerability is due to improper error handling on established SSL/TLS connections. An attacker could exploit this vulnerability by establishing an SSL/TLS connection with the affected device and then sending a malicious SSL/TLS message within that connection. A successful exploit could allow the attacker to cause the device to reload.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0092 60th 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
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Adaptive Security Appliance (ASA) SoftwareN/A—No fix listedCNA
  • Cisco Adaptive Security Appliance (ASA) Software VendorCisco Affected N/A Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.12:*:*:*:*:*:*:*9.13.1.12VulnerableCisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.13:*:*:*:*:*:*:*9.13.1.13VulnerableCisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.1.10:*:*:*:*:*:*:*9.14.1.10VulnerableCisco
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.12:*:*:*:*:*:*:* Versions 9.13.1.12 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.13.1.13:*:*:*:*:*:*:* Versions 9.13.1.13 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.14.1.10:*:*:*:*:*:*:* Versions 9.14.1.10 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27124
  2. 2026-10-03 Alias added: GHSA-j69q-qfwm-m736

References

Advisory 1

Other 2

  • 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