CVE-2021-1445
published 2021-04-29CVE-2021-1445: 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%
76.5th 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 < 9.12.4.13 | 9.12.4.13 |
| cisco | adaptive_security_appliance_software | >= 9.13 < 9.13.1.21 | 9.13.1.21 |
| cisco | adaptive_security_appliance_software | >= 9.14 < 9.14.2.8 | 9.14.2.8 |
| cisco | adaptive_security_appliance_software | >= 9.15 < 9.15.1.7 | 9.15.1.7 |
| cisco | adaptive_security_appliance_software | >= 9.7 < 9.8.4.34 | 9.8.4.34 |
| 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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
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-2021-1445 [HIGH] Cisco ASA/Firepower Threat Defense HTTPS Request out-of-bounds write (cisco-sa-asa-ftd-vpn-dos-fpBcpEcD)
A vulnerability classified as critical has been found in Cisco ASA and Firepower Threat Defense. Affected is an unknown function of the component HTTPS Request Handler. Performing a manipulation results in out-of-bounds write.
This vulnerability is reported as CVE-2021-1445. The attack is possible to be carried out remotely. No exploit exists.
It is recommended to upgrade the affected component.
GHSA
GHSA-4vpv-ghfw-pf42: 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-2021-1445 [HIGH] CWE-787 GHSA-4vpv-ghfw-pf42: 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-2021-1445 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
CVE-2021-1445: 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