CVE-2022-20751

Cisco Firepower Threat Defense (FTD) Software uses Snort integration that is vulnerable to unlimited memory consumption via crafted IP packets, leading to DoS. Affected component: Snort detection engine integration in FTD; root cause: insufficient memory management for certain Snort events, enabl...

CVE-2022-20946

Cisco Firepower Threat Defense (FTD) Software is affected by CVE-2022-20946, a memory-handling error in GRE tunnel decapsulation that can be exploited by unauthenticated remote attackers to restart the device and cause DoS. The issue affects GRE processing in FTD; exploitation requires sending a ...

CVE-2023-20270

CVE-2023-20270 concerns Cisco Firepower Threat Defense Software where the SMB protocol preprocessor and Snort 3 detection engine interaction is flawed due to improper error-checking when processing SMB traffic. An unauthenticated, remote attacker could send crafted SMB streams to bypass policies ...

CVE-2024-20293

CVE-2024-20293 describes a logic error in Cisco ASA and Firepower Threat Defense (FTD) Software where ACLs switch from inactive to active in the running configuration. This can let an unauthenticated, remote attacker bypass configured ACL protections, potentially granting access to trusted networ...

CVE-2023-20071

Cisco CVE-2023-20071 affects the Snort detection engine’s FTP inspection module across multiple Cisco products (notably FTD/ASA family). An unauthenticated, network-accessible attacker can craft FTP traffic to bypass FTP inspection and potentially deliver a payload, per Cisco’s security advisory ...

CVE-2019-12698

Cisco ASA Software and Cisco FTD WebVPN CPU Denial of Service (CVE-2019-12698) allows unauthenticated remote attackers to trigger high CPU by repeated WebVPN HTTP page requests, causing DoS. Affected ASA/FTD versions are mitigated by Cisco software updates; there are no supported workarounds per ...

CVE-2022-20854

The CVE-2022-20854 issue affects Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software, caused by improper error handling during SSH session establishment. An unauthenticated, remote attacker sending a high rate of crafted SSH connections can exhaust resources, leadi...

CVE-2022-20922

The CVE-2022-20922 entry concerns multiple vulnerabilities in the SMB2 processor of the Snort detection engine on Cisco products (Snort 3 configured). Affected component: Snort SMB2 processing; root cause: improper management of system resources while handling SMB2 traffic. Impact: unauthenticate...

CVE-2022-20928

CVE-2022-20928 describes a VPN authorization bypass in Cisco ASA/FTD where a flaw in the VPN authentication flow’s authorization verifications allows an unauthenticated remote attacker (with valid credentials) to establish a VPN session as a different user. The impact is privilege propagation wit...

CVE-2023-20245

CVE-2023-20245 affects Cisco ASA and Cisco FTD where multiple vulnerabilities in the per-user-override feature can allow an unauthenticated, remote attacker to bypass configured ACLs and let denied traffic flow through an affected device. The issues stem from a logic error in how per-user-overrid...

CVE-2023-20246

CVE-2023-20246 describes a vulnerability in Snort access control policies affecting multiple Cisco products, where a logic error during policy population could allow an unauthenticated, remote attacker to bypass configured access control rules. The impact is bypass of access controls with network...

CVE-2018-0240

CVE-2018-0240 affects Cisco ASA/FTD Application Layer Protocol Inspection. The vulnerability stems from logical errors in the inspection logic, allowing an unauthenticated, remote attacker to send high volumes of malicious traffic and trigger a deadlock that reloads the device (DoS). Affected sof...

CVE-2019-15256

CVE-2019-15256 affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Software in the IKEv1 feature. The root cause is improper management of system memory, allowing an unauthenticated, remote attacker to send malicious IKEv1 traffic and trigger a reload, causing a DoS. The attack do...

CVE-2020-3352

CVE-2020-3352 affects Cisco Firepower Threat Defense (FTD) Software CLI, where undocumented configuration commands allow an authenticated, local attacker to access hidden commands and modify various device configurations that should not be exposed via CLI. The root cause is exposure of hidden/und...

CVE-2020-3585

The CVE-2020-3585 issue affects Cisco ASA/FTD software for Cisco Firepower 1000 Series and is due to improper countermeasures against the Bleichenbacher RSA-TLS vulnerability in the TLS handler. An unauthenticated remote attacker could exploit crafted TLS messages to make the device act as an ora...

CVE-2021-34781

The CVE-2021-34781 issue affects Cisco Firepower Threat Defense (FTD) Software in multi-Instance deployments, where improper error handling during SSH session establishment allows an unauthenticated, remote attacker to trigger resource exhaustion and a DoS condition. Exploitation involves sending...

CVE-2021-1422

CVE-2021-1422 affects Cisco ASA Software Release 9.16.1 and Cisco FTD Software Release 7.0.0. The issue is a logic error in the software cryptography module that handles certain decryption errors over an established IPsec connection, causing an abnormal device reload and a DoS. The vulnerability’...

CVE-2021-1495

CVE-2021-1495 affects Cisco Snort detection engine used in multiple Cisco products. The flaw arises from incorrect handling of specific HTTP header parameters, enabling an unauthenticated, remote attacker to bypass a configured HTTP File Policy by sending crafted HTTP packets, potentially deliver...

CVE-2021-34783

CVE-2021-34783 affects Cisco ASA and Firepower Threat Defense (FTD) software’s SSL/TLS decryption path. The vulnerability arises from insufficient validation of SSL/TLS messages in the software-based TLS handler, allowing an unauthenticated, remote attacker to force a device reload and cause a Do...

CVE-2022-20943

CVE-2022-20943 pertains to Cisco Snort SMB2 processing. The SMB2 processor in Snort 3 (on affected Cisco products) is vulnerable to resource-management issues when handling SMB2 traffic, enabling unauthenticated remote attackers to bypass policies or cause DoS by sending high rates of SMB2 packet...

CVE-2022-20950

Cisco Firepower Threat Defense (FTD) is affected by CVE-2022-20950 due to a lack of error-checking when SIP bidirectional flows are inspected by Snort 3. The vulnerability allows an unauthenticated, remote attacker to trigger a restart of the Snort 3 detection engine, causing a DoS condition. A c...

CVE-2019-12700

The CVE-2019-12700 issue affects Cisco Firepower Threat Defense (FTD), Cisco Firepower Management Center (FMC), and Cisco FXOS Software. It is caused by improper resource management in PAM user session handling, enabling an authenticated remote attacker to exhaust system resources by initiating m...

CVE-2019-1693

The CVE-2019-1693 issue affects Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software, specifically the WebVPN portal. The root cause is improper management of authenticated WebVPN sessions, which can be exploited by an attacker with valid credentials ...

CVE-2019-1982

Cisco Firepower family components (FTD, FWS for ASA, and FMC) are affected by CVE-2019-1982, a vulnerability in the HTTP traffic filtering module where improper handling of HTTP requests with malicious headers (including HTTPS) can let an unauthenticated remote attacker bypass filtering protectio...

CVE-2020-3458

The CVE-2020-3458 entries describe multiple vulnerabilities in the secure boot process of Cisco ASA and Firepower Threat Defense (FTD) software on Firepower 1000/2100 series appliances. A local, authenticated attacker could bypass the chain of trust by injecting code into specific files used duri...

CVE-2021-1501

CVE-2021-1501 affects Cisco ASA and Firepower Threat Defense (FTD) SIP inspection engine. The root cause is a crash during a SIP pinhole hash lookup, allowing an unauthenticated remote attacker to crash and reload the device, causing a DoS. Cisco provides software updates addressing this vulnerab...

CVE-2018-0227

CVE-2018-0227 affects Cisco ASA/FTD SSL VPN Client Certificate Authentication. Root cause: incorrect verification of the SSL Client Certificate, enabling an unauthenticated, remote attacker to establish an SSL VPN connection and bypass certificate verification. Affected products include ASA/FTD s...

CVE-2019-12695

CVE-2019-12695 affects Cisco ASA and Cisco Firepower Threat Defense (FTD) WebVPN portals. The issue arises from insufficient validation of user-supplied input in the web-based management interface, enabling an unauthenticated, remote attacker to lure a user into clicking a crafted link and execut...

CVE-2020-3186

The CVE-2020-3186 entry concerns Cisco Firepower Threat Defense (FTD) Software where the management interface access lists can be misconfigured so that ports allowed in one list are denied in another. This permits an unauthenticated, remote attacker to bypass the management ACLs by sending crafte...

CVE-2020-3305

The CVE-2020-3305 issue affects Cisco ASA and Firepower Threat Defense (FTD) where the BGP module incorrectly processes certain BGP packets. An unauthenticated, remote attacker can craft BGP traffic to trigger a denial of service on the affected device. Multiple connected documents corroborate a ...

CVE-2020-3571

Cisco Firepower 4110 appliances running FTD software are affected by CVE-2020-3571 due to incomplete input validation in ICMP ingress packet processing, which could allow an unauthenticated remote attacker to exhaust memory and cause an unintended reload (DoS). The issue affects ICMP/ICMPv6 handl...

CVE-2021-34755

Cisco Firepower Threat Defense (FTD) Software CLI contains multiple command injection vulnerabilities. An authenticated, local attacker could exploit insufficient validation of user-supplied command arguments to execute arbitrary commands with root privileges on the underlying OS, including when ...

CVE-2022-20940

Cisco Firepower Threat Defense (FTD) Software is affected by a Bleichenbacher-related information disclosure in the TLS handler and SSL decryption policy implementation. The root cause is improper countermeasures against Bleichenbacher attacks, allowing an unauthenticated remote attacker to poten...

CVE-2023-20247

Cisco ASA (Adaptive Security Appliance) and Firepower Threat Defense (FTD) Software remote access SSL VPN vulnerabilities allow an authenticated, remote attacker to bypass a configured multiple certificate authentication policy and connect with only a valid username/password. Root cause is improp...

CVE-2020-3283

CVE-2020-3283 affects Cisco Firepower Threat Defense (FTD) on the 1000 Series. The vulnerability resides in the SSL/TLS handler and stems from a communication error between internal functions, which can be exploited by an unauthenticated remote attacker sending a crafted SSL/TLS message to trigge...

CVE-2021-1256

Cisco Firepower Threat Defense (FTD) Software CLI is affected by a local authenticated directory-traversal vulnerability that allows overwriting arbitrary files on the device’s filesystem due to insufficient path validation in a specific CLI command. This can cause system instability and may impa...

CVE-2021-34704

CVE-2021-34704 affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Web Services. The issue stems from improper input validation when parsing HTTPS requests, allowing an unauthenticated remote attacker to trigger a reload and cause a DoS. Multiple connected sources confirm a DoS vi...

CVE-2021-34791

Cisco ASA and Firepower Threat Defense (FTD) software contain multiple ALG/NAT bypass vulnerabilities (NAT Slipstreaming) due to an incorrect implementation of security checks in the ALG/NAT handling, allowing unauthenticated remote actors to bypass the ALG and open unauthorized connections behin...

CVE-2024-20261

CVE-2024-20261 affects Cisco Firepower Threat Defense (FTD) Software via the file policy feature that inspects encrypted archive files. The issue is a logic error triggered when inspecting a specific class of encrypted archives, allowing an unauthenticated, remote attacker to bypass a configured ...

CVE-2018-15398

Cisco ASA and Cisco FTD software contain a vulnerability in the per-user-override feature that could allow an unauthenticated, remote attacker to bypass an interface ACL. The fix/workaround details are not provided in the connected documents; exploitation would require network access through a vu...

CVE-2019-1715

CVE-2019-1715 affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD)Software. The issue is a low-entropy Deterministic Random Bit Generator (DRBG/PRNG) used for cryptographic key generation, which can allow an unauthenticated remote attacker to cause cryptographic collisions and pote...

CVE-2020-3565

CVE-2020-3565 affects Cisco Firepower Threat Defense (FTD) Software. The TCP Intercept feature can be triggered when the embryonic connection limit is reached, causing the detection engine to misprocess packets. An unauthenticated, remote attacker could craft traffic that matches a policy with TC...

CVE-2026-20049

CVE-2026-20049 affects Cisco Secure Firewall ASA and Threat Defense (FTD) software. The issue arises in processing GCM-encrypted IKEv2 IPsec traffic due to an insufficiently sized memory allocation, enabling an authenticated attacker to trigger a device reload and DoS. Exploitation requires valid...

CVE-2018-0244

CVE-2018-0244 affects Cisco Firepower System Software's detection engine. A vulnerability in SMB handling during large file transfer failures lets an unauthenticated, remote attacker bypass a configured file action policy and drop SMB malware file transfers. The issue arises when pieces of a file...

CVE-2020-3306

CVE-2020-3306 affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) DHCP module. The root cause is incorrect processing of certain DHCP packets, which an unauthenticated remote attacker can exploit by sending a crafted DHCP packet to cause an on-device denial of service. Public docu...

CVE-2021-34792

Cisco CVE-2021-34792 affects Cisco ASA Software and Firepower Threat Defense (FTD) due to a memory management/resource handling flaw under high connection rates. An unauthenticated, remote attacker could cause a DoS by opening a large number of connections, potentially causing the device to reloa...

CVE-2026-20073

Cisco Secure Firewall ASA and FTD platforms are affected by CVE-2026-20073 due to improper error handling when a cluster-joining device runs out of memory while replicating access control rules. An unauthenticated remote attacker could send traffic that should be blocked, potentially bypassing AC...

CVE-2019-1703

CVE-2019-1703 affects Cisco Firepower Threat Defense Software on the Cisco Firepower 2100 Series. The issue is a logic error in the internal packet-processing path that may prevent ingress buffers from being replenished under certain traffic conditions. An unauthenticated, remote attacker could s...

CVE-2020-3188

Cisco Firepower Threat Defense (FTD) Software is affected by a DoS vulnerability in the management interface due to long default session timeouts for to-the-box remote management connections. An unauthenticated, remote attacker could send a sustained flood of crafted management connections, causi...

CVE-2020-3189

CVE-2020-3189 affects Cisco Firepower Threat Defense (FTD) Software VPN System Logging. Root cause: memory not properly freed for VPN System Logging events when a VPN session is created or deleted, allowing a remote, unauthenticated attacker to repeatedly create/delete VPN tunnels to leak memory ...