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HIGH · 8.6

CVE-2021-40118

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to t...

Vulnerability Description

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

CVSS Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CiscoAdaptive Security Appliance< 9.8.4.40
CiscoFirepower Threat Defense< 6.4.0.13
CiscoAdaptive Security Appliance Software>= 9.9.0, < 9.12.4.29
CiscoAsa 5512-X Firmware009.012\(004.024\)
CiscoAsa 5512-X-
CiscoAsa 5505 Firmware009.012\(004.024\)
CiscoAsa 5505-
CiscoAsa 5515-X Firmware009.012\(004.024\)
CiscoAsa 5515-X-
CiscoAsa 5525-X Firmware009.012\(004.024\)
CiscoAsa 5525-X-
CiscoAsa 5545-X Firmware009.012\(004.024\)
CiscoAsa 5545-X-
CiscoAsa 5555-X Firmware009.012\(004.024\)
CiscoAsa 5555-X-
CiscoAsa 5580 Firmware009.012\(004.024\)
CiscoAsa 5580-
CiscoAsa 5585-X Firmware009.012\(004.024\)
CiscoAsa 5585-X-

Related Weaknesses (CWE)

CWE-121CWE-787

References

FAQ

What is CVE-2021-40118?

CVE-2021-40118 is a vulnerability with a CVSS score of 8.6 (HIGH). A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to t...

How severe is CVE-2021-40118?

CVE-2021-40118 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40118?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Adaptive Security Appliance, Cisco Firepower Threat Defense, Cisco Adaptive Security Appliance Software, Cisco Asa 5512-X Firmware, Cisco Asa 5512-X.