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TI-2021-13785 Aliases CVE-2021-34787GHSA-9jgg-4q8x-859v

Improper handling of exceptional conditions in Cisco Adaptive Security Appliance Software

Priority LOW 32CWE-183Published · Updated

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 identity-based firewall (IDFW) rule processing feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass security protections. This vulnerability is due to improper handling of network requests by affected devices configured to use object group search. An attacker could exploit this vulnerability by sending a specially crafted network request to an affected device. A successful exploit could allow the attacker to bypass access control list (ACL) rules on the device, bypass security protections, and send network traffic to unauthorized hosts.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01045 64th 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 · 27

CPEVersionsRoleVendor
cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*before 9.8.4.40VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*before 6.4.0.13; 6.5.0 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:*:*:*:*:*:*:*:*9.9.0 to before 9.12.4.25; 9.13.0 to before 9.14.3.1; 9.15.0 to before 9.15.1.17; 9.16.0 to before 9.16.1.28VulnerableCisco
cpe:2.3:o:cisco:asa_5512-x_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
cpe:2.3:o:cisco:asa_5512-x_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5505_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
cpe:2.3:o:cisco:asa_5505_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5515-x_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
  • cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* Versions before 9.8.4.40 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions before 6.4.0.13; 6.5.0 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 9.9.0 to before 9.12.4.25; 9.13.0 to before 9.14.3.1; 9.15.0 to before 9.15.1.17; 9.16.0 to before 9.16.1.28 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5512-x_firmware:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5512-x_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5505_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
Show 17 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:asa_5515-x_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5525-x_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
cpe:2.3:o:cisco:asa_5525-x_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5545-x_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
cpe:2.3:o:cisco:asa_5545-x_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5555-x_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
cpe:2.3:o:cisco:asa_5555-x_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5580_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
cpe:2.3:o:cisco:asa_5580_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:asa_5585-x_firmware:009.009:*:*:*:*:*:*:*009.009VulnerableCisco
cpe:2.3:o:cisco:asa_5585-x_firmware:009.012:*:*:*:*:*:*:*009.012VulnerableCisco
cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:asa_5515-x_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5525-x_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5545-x_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5555-x_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5580_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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:009.009:*:*:*:*:*:*:* Versions 009.009 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:asa_5585-x_firmware:009.012:*:*:*:*:*:*:* Versions 009.012 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-2021-34787
  2. 2026-10-03 Alias added: GHSA-9jgg-4q8x-859v

References

Advisory 1

  • TI-2020-02861 Uncontrolled resource consumption in Cisco Adaptive Security Appliance Software CVSS 3.1HIGH 8.6
  • TI-2021-17312 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2020-03115 Uncontrolled resource consumption in Cisco Adaptive Security Appliance Software CVSS 3.1HIGH 8.6
  • TI-2020-03075 Uncontrolled resource consumption in Cisco Adaptive Security Appliance Software CVSS 3.1HIGH 8.6
  • TI-2020-02985 Unrestricted file upload in Cisco Adaptive Security Appliance Software CVSS 3.1HIGH 8.6
  • TI-2021-17313 Stack-based buffer overflow in Cisco Adaptive Security Appliance Software CVSS 3.1HIGH 8.6
See all 62 →

Sources

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