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TI-2021-13790 Aliases CVE-2021-34792GHSA-6crr-3cm4-99qh

Uncontrolled resource consumption in Cisco Adaptive Security Appliance Software

Priority MEDIUM 46CWE-400Published · 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-400.

Summary

A vulnerability in the memory management of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management when connection rates are high. An attacker could exploit this vulnerability by opening a significant number of connections on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01444 73rd 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) Softwareall versions—No fix listedCNA
  • Cisco Adaptive Security Appliance (ASA) Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 42

CPEVersionsRoleVendor
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*6.4.0 to before 6.4.0.13; 6.6.0 to before 6.6.5; 6.7.0 to before 6.7.0.3; 7.0.0 to before 7.0.1VulnerableCisco
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*9.8.0 to before 9.8.4.40; 9.12.0 to before 9.12.4.29; 9.14.0 to before 9.14.3.9; 9.15.0 to before 9.15.1.17; 9.16.0 to before 9.16.2.3VulnerableCisco
cpe:2.3:o:cisco:asa_5512-x_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5512-x_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5512-x_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
cpe:2.3:o:cisco:asa_5512-x_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5505_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5505_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5505_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
  • cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions 6.4.0 to before 6.4.0.13; 6.6.0 to before 6.6.5; 6.7.0 to before 6.7.0.3; 7.0.0 to before 7.0.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* Versions 9.8.0 to before 9.8.4.40; 9.12.0 to before 9.12.4.29; 9.14.0 to before 9.14.3.9; 9.15.0 to before 9.15.1.17; 9.16.0 to before 9.16.2.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5512-x_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5512-x_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5512-x_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5512-x_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:asa_5505_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5505_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5505_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
Show 32 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:asa_5505_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5515-x_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5515-x_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5515-x_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
cpe:2.3:o:cisco:asa_5515-x_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5525-x_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5525-x_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5525-x_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
cpe:2.3:o:cisco:asa_5525-x_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5545-x_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5545-x_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5545-x_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
cpe:2.3:o:cisco:asa_5545-x_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5555-x_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5555-x_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5555-x_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
cpe:2.3:o:cisco:asa_5555-x_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5580_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5580_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5580_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
cpe:2.3:o:cisco:asa_5580_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5585-x_firmware:009.014\(001.150\):*:*:*:*:*:*:*009.014(001.150)VulnerableCisco
cpe:2.3:o:cisco:asa_5585-x_firmware:099.017\(001.211\):*:*:*:*:*:*:*099.017(001.211)VulnerableCisco
cpe:2.3:o:cisco:asa_5585-x_firmware:099.017\(001.220\):*:*:*:*:*:*:*099.017(001.220)VulnerableCisco
cpe:2.3:o:cisco:asa_5585-x_firmware:099.017\(015.050\):*:*:*:*:*:*:*099.017(015.050)VulnerableCisco
cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:asa_5505_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:asa_5515-x_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5515-x_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5515-x_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5515-x_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:asa_5525-x_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5525-x_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5525-x_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5525-x_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:asa_5545-x_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5545-x_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5545-x_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5545-x_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:asa_5555-x_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5555-x_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5555-x_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5555-x_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:asa_5580_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5580_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5580_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5580_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:asa_5585-x_firmware:009.014\(001.150\):*:*:*:*:*:*:* Versions 009.014(001.150) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5585-x_firmware:099.017\(001.211\):*:*:*:*:*:*:* Versions 099.017(001.211) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5585-x_firmware:099.017\(001.220\):*:*:*:*:*:*:* Versions 099.017(001.220) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5585-x_firmware:099.017\(015.050\):*:*:*:*:*:*:* Versions 099.017(015.050) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34792
  2. 2026-10-03 Alias added: GHSA-6crr-3cm4-99qh

References

Advisory 1

  • 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