CVE-2021-1504
published 2021-04-29CVE-2021-1504: Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote…
PriorityP344high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.66%
76.4th percentile
Multiple vulnerabilities in 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. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | adaptive_security_appliance | — | — |
| cisco | adaptive_security_appliance_software | >= 9.10 < 9.12.4.10 | 9.12.4.10 |
| cisco | adaptive_security_appliance_software | >= 9.13 < 9.13.1.21 | 9.13.1.21 |
| cisco | adaptive_security_appliance_software | >= 9.14 < 9.14.2.4 | 9.14.2.4 |
| cisco | adaptive_security_appliance_software | >= 9.15 < 9.15.1.7 | 9.15.1.7 |
| cisco | adaptive_security_appliance_software | >= 9.7 < 9.8.4.35 | 9.8.4.35 |
| cisco | adaptive_security_appliance_software | >= 9.9 < 9.9.2.85 | 9.9.2.85 |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | secure_firewall_threat_defense | >= 6.5.0 < 6.6.4 | 6.6.4 |
| cisco | secure_firewall_threat_defense | >= 6.7.0 < 6.7.0.1 | 6.7.0.1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
vendor_cisco8.6HIGH
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VulDB
Cisco ASA/Firepower Threat Defense HTTPS Request out-of-bounds write (cisco-sa-asa-ftd-vpn-dos-fpBcpEcD)
vuldb·2026-08-12·CVSS 7.5
CVE-2021-1504 [HIGH] Cisco ASA/Firepower Threat Defense HTTPS Request out-of-bounds write (cisco-sa-asa-ftd-vpn-dos-fpBcpEcD)
A vulnerability, which was classified as critical, was found in Cisco ASA and Firepower Threat Defense. This affects an unknown part of the component HTTPS Request Handler. The manipulation results in out-of-bounds write.
This vulnerability is known as CVE-2021-1504. It is possible to launch the attack remotely. No exploit is available.
You should upgrade the affected component.
GHSA
GHSA-g6f3-7pfm-rg7m: Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticate
ghsa_unreviewed·2022-05-24
CVE-2021-1504 [HIGH] CWE-787 GHSA-g6f3-7pfm-rg7m: Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticate
Multiple vulnerabilities in 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. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
Cisco
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
vendor_cisco·2021-04-28·CVSS 8.6
CVE-2021-1445 [HIGH] CWE-787 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
Multiple vulnerabilities in 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.
These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulner
Cisco
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
vendor_cisco·CVSS 3.1
CVE-2021-1504 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
CVE-2021-1504: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
Multiple vulnerabilities in 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. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note : This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information,
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-04-29
Published